diff --git a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
index 469e14de9..a48e40d8a 100644
--- a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
@@ -686,7 +686,7 @@ void allocateDetectorStructureMemory() {
 void setupDetector() {
 
     allocateDetectorStructureMemory();
-    setDefaultDacs();
+    resetToDefaultDacs(false);
 #ifdef VIRTUAL
     sharedMemory_setStatus(IDLE);
 #endif
@@ -748,7 +748,15 @@ void setupDetector() {
     LOG(logDEBUG1, ("Setup detector done\n\n"));
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     for (int i = 0; i < NDAC; ++i) {
diff --git a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
index 4c477828f..cbfb85690 100644
--- a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
@@ -481,7 +481,15 @@ void setupDetector() {
     setCurrentSource(DEFAULT_CURRENT_SOURCE);
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     for (int i = 0; i < NDAC; ++i) {
diff --git a/slsDetectorServers/gotthardDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/gotthardDetectorServer/slsDetectorFunctionList.c
index c78130e24..eabe0ad9b 100644
--- a/slsDetectorServers/gotthardDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/gotthardDetectorServer/slsDetectorFunctionList.c
@@ -406,7 +406,7 @@ void setupDetector() {
                        DAC_MAX_MV);
     LTC2620_Disable();
     LTC2620_Configure();
-    setDefaultDacs();
+    resetToDefaultDacs(false);
 
     // temp
     bus_w(TEMP_SPI_IN_REG, TEMP_SPI_IN_IDLE_MSK);
@@ -434,7 +434,15 @@ void setupDetector() {
     setDelayAfterTrigger(DEFAULT_DELAY);
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     for (int i = 0; i < NDAC; ++i) {
diff --git a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
index efd143ad4..82ef4c7ae 100644
--- a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
@@ -426,7 +426,7 @@ void setupDetector() {
                        DAC_MAX_MV);
     LTC2620_Disable();
     LTC2620_Configure();
-    setDefaultDacs();
+    resetToDefaultDacs(false);
 
     // altera pll
     ALTERA_PLL_SetDefines(
@@ -470,7 +470,15 @@ void setupDetector() {
     setTemperatureEvent(0);
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     for (int i = 0; i < NDAC; ++i) {
diff --git a/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
index 67db5dada..a0daec6bd 100644
--- a/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
@@ -517,7 +517,7 @@ void setupDetector() {
                        DAC_MAX_MV); // has to be before setvchip
     LTC2620_Disable();
     LTC2620_Configure();
-    setDefaultDacs();
+    resetToDefaultDacs(false);
 
     // altera pll
     ALTERA_PLL_SetDefines(PLL_CNTRL_REG, PLL_PARAM_REG,
@@ -614,7 +614,15 @@ void updateDataBytes() {
     dataBytes = analogDataBytes;
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     for (int i = 0; i < NDAC; ++i) {
diff --git a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
index 3dd83bb0f..9ccbb4a55 100644
--- a/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c
@@ -450,7 +450,7 @@ void setupDetector() {
 
     // defaults
     setHighVoltage(DEFAULT_HIGH_VOLTAGE);
-    setDefaultDacs();
+    resetToDefaultDacs(false);
     setASICDefaults();
     setADIFDefaults();
 
@@ -527,7 +527,15 @@ void setupDetector() {
     setAllTrimbits(DEFAULT_TRIMBIT_VALUE);
 }
 
-int setDefaultDacs() {
+int resetToDefaultDacs(int hardReset) {
+    // reset defaults to hardcoded defaults
+    if (hardReset) {
+        const int vals[] = DEFAULT_DAC_VALS;
+        for (int i = 0; i < NDAC; ++i) {
+            defaultDacValues[i] = vals[i];
+        }
+    }
+    // reset dacs to defaults
     int ret = OK;
     LOG(logINFOBLUE, ("Setting Default Dac values\n"));
     {
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
index 066f73132..6edd11497 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
@@ -117,7 +117,7 @@ void updateDataBytes();
 #endif
 
 #ifndef CHIPTESTBOARDD
-int setDefaultDacs();
+int resetToDefaultDacs(int hardReset);
 int getDefaultDac(enum DACINDEX index, enum detectorSettings sett, int *retval);
 int setDefaultDac(enum DACINDEX index, enum detectorSettings sett, int value);
 #endif
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
index cf96c4b07..9313284af 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
@@ -239,7 +239,7 @@ int reconfigure_udp(int);
 int validate_udp_configuration(int);
 int get_bursts_left(int);
 int start_readout(int);
-int set_default_dacs(int);
+int reset_to_default_dacs(int);
 int is_virtual(int);
 int get_pattern(int);
 int load_default_pattern(int);
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
index 9751877d1..5ca9df10b 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
@@ -364,7 +364,7 @@ void function_table() {
     flist[F_VALIDATE_UDP_CONFIG] = &validate_udp_configuration;
     flist[F_GET_BURSTS_LEFT] = &get_bursts_left;
     flist[F_START_READOUT] = &start_readout;
-    flist[F_SET_DEFAULT_DACS] = &set_default_dacs;
+    flist[F_RESET_TO_DEFAULT_DACS] = &reset_to_default_dacs;
     flist[F_IS_VIRTUAL] = &is_virtual;
     flist[F_GET_PATTERN] = &get_pattern;
     flist[F_LOAD_DEFAULT_PATTERN] = &load_default_pattern;
@@ -1627,7 +1627,7 @@ int set_settings(int file_des) {
             validate(&ret, mess, (int)isett, (int)retval, "set settings", DEC);
 #ifdef GOTTHARDD
             if (ret == OK) {
-                ret = setDefaultDacs();
+                ret = resetToDefaultDacs(false);
                 if (ret == FAIL) {
                     strcpy(mess, "Could change settings, but could not set to "
                                  "default dacs\n");
@@ -8090,17 +8090,22 @@ int start_readout(int file_des) {
     return Server_SendResult(file_des, INT32, NULL, 0);
 }
 
-int set_default_dacs(int file_des) {
+int reset_to_default_dacs(int file_des) {
     ret = OK;
     memset(mess, 0, sizeof(mess));
+    int arg = -1;
+    if (receiveData(file_des, &arg, sizeof(arg), INT32) < 0)
+        return printSocketReadError();
+    LOG(logINFO, ("Resetting dacs to defaults (hard reset: %d)\n", arg));
 
 #ifdef CHIPTESTBOARDD
     functionNotImplemented();
 #else
     if (Server_VerifyLock() == OK) {
-        if (setDefaultDacs() == FAIL) {
+        if (resetToDefaultDacs(arg) == FAIL) {
             ret = FAIL;
-            strcpy(mess, "Could not set default dacs");
+            sprintf(mess, "Could not %s reset default dacs",
+                    (arg == 1 ? "hard" : ""));
             LOG(logERROR, (mess));
         }
     }
diff --git a/slsDetectorSoftware/include/sls/Detector.h b/slsDetectorSoftware/include/sls/Detector.h
index 81b7ea70d..2e169f8e9 100644
--- a/slsDetectorSoftware/include/sls/Detector.h
+++ b/slsDetectorSoftware/include/sls/Detector.h
@@ -427,8 +427,10 @@ class Detector {
     void setDefaultDac(defs::dacIndex index, int defaultValue,
                        defs::detectorSettings sett, Positions pos = {});
 
-    /** [Eiger][Jungfrau][Moench][Gotthard][Gotthard2][Mythen3] */
-    void setDefaultDacs(Positions pos = {});
+    /** [Eiger][Jungfrau][Moench][Gotthard][Gotthard2][Mythen3]
+    reset to defaults, hardReset will reset to hardcoded defaults on on-board
+    server */
+    void resetToDefaultDacs(const bool hardReset, Positions pos = {});
 
     Result<int> getDAC(defs::dacIndex index, bool mV = false,
                        Positions pos = {}) const;
diff --git a/slsDetectorSoftware/src/CmdProxy.cpp b/slsDetectorSoftware/src/CmdProxy.cpp
index a51bf437d..3f8b93659 100644
--- a/slsDetectorSoftware/src/CmdProxy.cpp
+++ b/slsDetectorSoftware/src/CmdProxy.cpp
@@ -1095,6 +1095,37 @@ std::string CmdProxy::DacValues(int action) {
     return os.str();
 }
 
+std::string CmdProxy::ResetDacs(int action) {
+    std::ostringstream os;
+    os << cmd << ' ';
+    if (action == defs::HELP_ACTION) {
+        os << "[(optional) hard] "
+              "\n\t[Eiger][Jungfrau][Gotthard][Moench][Gotthard2]["
+              "Mythen3]Reset dac values to the defaults. A 'hard' optional "
+              "reset will reset the dacs to the hardcoded defaults in on-board "
+              "detector server."
+           << '\n';
+    } else if (action == defs::GET_ACTION) {
+        throw sls::RuntimeError("Cannot get");
+    } else if (action == defs::PUT_ACTION) {
+        bool hardReset = false;
+        if (args.size() == 1) {
+            if (args[0] != "hard") {
+                throw sls::RuntimeError("Unknown argument " + args[0] +
+                                        ". Did you mean hard?");
+            }
+            hardReset = true;
+        } else if (args.size() > 1) {
+            WrongNumberOfParameters(1);
+        }
+        det->resetToDefaultDacs(hardReset, std::vector<int>{det_id});
+        os << "successful\n";
+    } else {
+        throw sls::RuntimeError("Unknown action");
+    }
+    return os.str();
+}
+
 std::string CmdProxy::DefaultDac(int action) {
     std::ostringstream os;
     os << cmd << ' ';
@@ -1111,10 +1142,12 @@ std::string CmdProxy::DefaultDac(int action) {
         if (args.size() == 2) {
             auto t = det->getDefaultDac(
                 StringTo<defs::dacIndex>(args[0]),
-                sls::StringTo<slsDetectorDefs::detectorSettings>(args[1]));
+                sls::StringTo<slsDetectorDefs::detectorSettings>(args[1]),
+                std::vector<int>{det_id});
             os << args[0] << ' ' << args[1] << ' ' << OutString(t) << '\n';
         } else {
-            auto t = det->getDefaultDac(StringTo<defs::dacIndex>(args[0]));
+            auto t = det->getDefaultDac(StringTo<defs::dacIndex>(args[0]),
+                                        std::vector<int>{det_id});
             os << args[0] << ' ' << OutString(t) << '\n';
         }
     } else if (action == defs::PUT_ACTION) {
@@ -1125,7 +1158,8 @@ std::string CmdProxy::DefaultDac(int action) {
         if (args.size() == 3) {
             det->setDefaultDac(
                 StringTo<defs::dacIndex>(args[0]), StringTo<int>(args[1]),
-                sls::StringTo<slsDetectorDefs::detectorSettings>(args[2]));
+                sls::StringTo<slsDetectorDefs::detectorSettings>(args[2]),
+                std::vector<int>{det_id});
             os << args[0] << ' ' << args[2] << ' ' << args[1] << '\n';
         } else {
             det->setDefaultDac(StringTo<defs::dacIndex>(args[0]),
diff --git a/slsDetectorSoftware/src/CmdProxy.h b/slsDetectorSoftware/src/CmdProxy.h
index ced9be101..6575fcf24 100644
--- a/slsDetectorSoftware/src/CmdProxy.h
+++ b/slsDetectorSoftware/src/CmdProxy.h
@@ -671,6 +671,8 @@ class CmdProxy {
         {"vipre_cds", "dac"},
         {"ibias_sfp", "dac"},
 
+        {"defaultdacs", "resetdacs"},
+
         /* acquisition */
         {"busy", "clearbusy"},
         {"receiver", "rx_status"},
@@ -816,7 +818,7 @@ class CmdProxy {
         {"dac", &CmdProxy::Dac},
         {"daclist", &CmdProxy::daclist},
         {"dacvalues", &CmdProxy::DacValues},
-        {"defaultdacs", &CmdProxy::defaultdacs},
+        {"resetdacs", &CmdProxy::ResetDacs},
         {"defaultdac", &CmdProxy::DefaultDac},
 
         /* on chip dacs */
@@ -1095,6 +1097,7 @@ class CmdProxy {
     /* dacs */
     std::string Dac(int action);
     std::string DacValues(int action);
+    std::string ResetDacs(int action);
     std::string DefaultDac(int action);
     /* acquisition */
     std::string ReceiverStatus(int action);
@@ -1383,10 +1386,6 @@ class CmdProxy {
         daclist, getDacList,
         "\n\tGets the list of commands for every dac for this detector.");
 
-    EXECUTE_SET_COMMAND(defaultdacs, setDefaultDacs,
-                        "\n\t[Eiger][Jungfrau][Gotthard][Moench][Gotthard2]["
-                        "Mythen3]Sets default dacs on to the detector.");
-
     /* on chip dacs */
     INTEGER_USER_IND_COMMAND(
         vchip_comp_fe, getOnChipDAC, setOnChipDAC, StringTo<int>,
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index 6d4d0462b..b2fde0519 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -657,8 +657,8 @@ void Detector::setDefaultDac_(defs::dacIndex index, int defaultValue,
     pimpl->Parallel(&Module::setDefaultDac, pos, index, defaultValue, sett);
 }
 
-void Detector::setDefaultDacs(Positions pos) {
-    pimpl->Parallel(&Module::setDefaultDacs, pos);
+void Detector::resetToDefaultDacs(const bool hardReset, Positions pos) {
+    pimpl->Parallel(&Module::resetToDefaultDacs, hardReset, pos);
 }
 
 Result<int> Detector::getDAC(defs::dacIndex index, bool mV,
diff --git a/slsDetectorSoftware/src/Module.cpp b/slsDetectorSoftware/src/Module.cpp
index e06775498..bb46d9ee2 100644
--- a/slsDetectorSoftware/src/Module.cpp
+++ b/slsDetectorSoftware/src/Module.cpp
@@ -629,7 +629,10 @@ void Module::setDefaultDac(slsDetectorDefs::dacIndex index, int defaultValue,
     return sendToDetector(F_SET_DEFAULT_DAC, args, nullptr);
 }
 
-void Module::setDefaultDacs() { sendToDetector(F_SET_DEFAULT_DACS); }
+void Module::resetToDefaultDacs(const bool hardReset) {
+    sendToDetector(F_RESET_TO_DEFAULT_DACS, static_cast<int>(hardReset),
+                   nullptr);
+}
 
 void Module::setDAC(int val, dacIndex index, bool mV) {
     int args[]{static_cast<int>(index), static_cast<int>(mV), val};
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index f3fda46a1..2e7248120 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -152,7 +152,7 @@ class Module : public virtual slsDetectorDefs {
                       slsDetectorDefs::detectorSettings sett);
     void setDefaultDac(slsDetectorDefs::dacIndex index, int defaultValue,
                        defs::detectorSettings sett);
-    void setDefaultDacs();
+    void resetToDefaultDacs(const bool hardReset);
     int getDAC(dacIndex index, bool mV) const;
     void setDAC(int val, dacIndex index, bool mV);
     bool getPowerChip() const;
diff --git a/slsDetectorSoftware/tests/test-CmdProxy.cpp b/slsDetectorSoftware/tests/test-CmdProxy.cpp
index ab769e71c..cb89887b5 100644
--- a/slsDetectorSoftware/tests/test-CmdProxy.cpp
+++ b/slsDetectorSoftware/tests/test-CmdProxy.cpp
@@ -1466,16 +1466,17 @@ TEST_CASE("defaultdac", "[.cmd]") {
     }
 }
 
-TEST_CASE("defaultdacs", "[.cmd]") {
+TEST_CASE("resetdacs", "[.cmd]") {
     Detector det;
     CmdProxy proxy(&det);
     auto det_type = det.getDetectorType().squash();
     if (det_type != defs::CHIPTESTBOARD) {
-        REQUIRE_THROWS(proxy.Call("defaultdacs", {}, -1, GET));
-        REQUIRE_NOTHROW(proxy.Call("defaultdacs", {}, -1, PUT));
+        REQUIRE_THROWS(proxy.Call("resetdacs", {}, -1, GET));
+        REQUIRE_NOTHROW(proxy.Call("resetdacs", {}, -1, PUT));
+        REQUIRE_NOTHROW(proxy.Call("resetdacs", {"hard"}, -1, PUT));
     } else {
-        REQUIRE_THROWS(proxy.Call("defaultdacs", {}, -1, GET));
-        REQUIRE_THROWS(proxy.Call("defaultdacs", {}, -1, PUT));
+        REQUIRE_THROWS(proxy.Call("resetdacs", {}, -1, GET));
+        REQUIRE_THROWS(proxy.Call("resetdacs", {}, -1, PUT));
     }
 }
 
diff --git a/slsSupportLib/include/sls/sls_detector_funcs.h b/slsSupportLib/include/sls/sls_detector_funcs.h
index 27d783094..db452dcf0 100755
--- a/slsSupportLib/include/sls/sls_detector_funcs.h
+++ b/slsSupportLib/include/sls/sls_detector_funcs.h
@@ -215,7 +215,7 @@ enum detFuncs {
     F_VALIDATE_UDP_CONFIG,
     F_GET_BURSTS_LEFT,
     F_START_READOUT,
-    F_SET_DEFAULT_DACS,
+    F_RESET_TO_DEFAULT_DACS,
     F_IS_VIRTUAL,
     F_GET_PATTERN,
     F_LOAD_DEFAULT_PATTERN,
@@ -555,7 +555,7 @@ const char* getFunctionNameFromEnum(enum detFuncs func) {
     case F_VALIDATE_UDP_CONFIG:             return "F_VALIDATE_UDP_CONFIG";                               
     case F_GET_BURSTS_LEFT:                 return "F_GET_BURSTS_LEFT";
     case F_START_READOUT:                   return "F_START_READOUT";
-    case F_SET_DEFAULT_DACS:                return "F_SET_DEFAULT_DACS";
+    case F_RESET_TO_DEFAULT_DACS:           return "F_RESET_TO_DEFAULT_DACS";
     case F_IS_VIRTUAL:                      return "F_IS_VIRTUAL";
     case F_GET_PATTERN:                     return "F_GET_PATTERN";
     case F_LOAD_DEFAULT_PATTERN:            return "F_LOAD_DEFAULT_PATTERN";