diff --git a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
index 2020b7544..f479f654c 100644
--- a/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/eigerDetectorServer/slsDetectorFunctionList.c
@@ -33,6 +33,10 @@ extern int isControlServer;
 extern void getMacAddressinString(char *cmac, int size, uint64_t mac);
 extern void getIpAddressinString(char *cip, uint32_t ip);
 
+// Variables that will be exported
+int masterCommandLine = -1;
+int topCommandLine = -1;
+
 int initError = OK;
 int initCheckDone = 0;
 char initErrorMessage[MAX_STR_LENGTH];
@@ -368,6 +372,7 @@ void initStopServer() {
         return;
     }
 #else
+    // control server read config file and already set up master/top
     sharedMemory_lockLocalLink();
     Feb_Interface_FebInterface();
     Feb_Control_FebControl();
@@ -432,6 +437,11 @@ int readConfigFile() {
         return initError;
     }
 
+#ifndef VIRTUAL
+    // if not found in config file, they will be reset to hardware settings
+    top = -1;
+    master = -1;
+#endif
     if (ignoreConfigFileFlag) {
         return OK;
     }
@@ -577,8 +587,10 @@ int readConfigFile() {
         LOG(logINFO, ("Successfully read config file\n"));
     }
 
+#ifndef VIRTUAL
     // reset to hardware settings if not in config file (if overwritten)
     resetToHardwareSettings();
+#endif
 
     return initError;
 }
@@ -590,6 +602,7 @@ void resetToHardwareSettings() {
     }
     // top not set in config file
     if (top == -1) {
+        LOG(logINFO, ("Resetting Top to hardware settings\n"));
         if (!Beb_SetTop(TOP_HARDWARE)) {
             initError = FAIL;
             strcpy(initErrorMessage,
@@ -619,6 +632,7 @@ void resetToHardwareSettings() {
     }
     // master not set in config file
     if (master == -1) {
+        LOG(logINFO, ("Resetting Master to hardware settings\n"));
         if (!Beb_SetMaster(MASTER_HARDWARE)) {
             initError = FAIL;
             strcpy(initErrorMessage,
@@ -649,6 +663,8 @@ void resetToHardwareSettings() {
 #endif
 }
 
+int checkCommandLineConfiguration() {}
+
 /* set up detector */
 
 void allocateDetectorStructureMemory() {
@@ -1462,7 +1478,7 @@ int setHighVoltage(int val) {
 /* parameters - timing, extsig */
 
 int setMaster(int m) {
-    LOG(logINFO, ("Setting up as %s\n", (m == 1 ? "Master" : "Slave")));
+    LOG(logINFOBLUE, ("Setting up as %s\n", (m == 1 ? "Master" : "Slave")));
 #ifdef VIRTUAL
     master = m;
 #else
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer.c
index 663064ec2..d71b1a9d9 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer.c
@@ -32,6 +32,13 @@ extern int ignoreConfigFileFlag;
 #ifdef GOTTHARDD
 extern int phaseShift;
 #endif
+#if defined(GOTTHARDD) || defined(GOTTHARD2D) || defined(EIGERD) ||            \
+    defined(MYTHEN3D)
+extern int masterCommandLine;
+#endif
+#ifdef EIGERD
+extern int topCommandLine;
+#endif
 
 void error(char *msg) { perror(msg); }
 
@@ -50,6 +57,13 @@ int main(int argc, char *argv[]) {
     checkModuleFlag = 1;
     int version = 0;
     ignoreConfigFileFlag = 0;
+#if defined(GOTTHARDD) || defined(GOTTHARD2D) || defined(EIGERD) ||            \
+    defined(MYTHEN3D)
+    masterCommandLine = -1;
+#endif
+#ifdef EIGERD
+    topCommandLine = -1;
+#endif
 
     // help message
     char helpMessage[MAX_STR_LENGTH];
@@ -70,6 +84,11 @@ int main(int argc, char *argv[]) {
         "\t-i, --ignore-config      : "
         "[Virtual][Eiger][Jungfrau][Gotthard][Gotthard2] \n"
         "\t                           Ignore config file. \n"
+        "\t-m, --master <master>    : [Eiger][Mythen3][Gotthard][Gotthard2] \n"
+        "\t                           Set Master to 0 or 1. Precedence over "
+        "config file. \n"
+        "\t-t, --top <top>          : [Eiger] Set Top to 0 or 1. Precedence "
+        "over config file. \n"
         "\t-s, --stopserver         : Stop server. Do not use as it is created "
         "by control server \n\n",
         argv[0]);
@@ -86,6 +105,8 @@ int main(int argc, char *argv[]) {
         {"devel", no_argument, NULL, 'd'},
         {"update", no_argument, NULL, 'u'},
         {"ignore-config", no_argument, NULL, 'i'},
+        {"master", required_argument, NULL, 'm'},
+        {"top", required_argument, NULL, 't'},
         {"stopserver", no_argument, NULL, 's'},
         {NULL, 0, NULL, 0}};
 
@@ -177,6 +198,41 @@ int main(int argc, char *argv[]) {
 #endif
             break;
 
+        case 'm':
+#if defined(GOTTHARDD) || defined(GOTTHARD2D) || defined(EIGERD) ||            \
+    defined(MYTHEN3D)
+            if (sscanf(optarg, "%d", &masterCommandLine) != 1) {
+                LOG(logERROR, ("Cannot scan master argument\n%s", helpMessage));
+                exit(EXIT_FAILURE);
+            }
+            if (masterCommandLine == 0) {
+                LOG(logINFO, ("Detector Slave mode\n"));
+            } else {
+                LOG(logINFO, ("Detector Master mode\n"));
+            }
+#else
+            LOG(logERROR, ("No master implemented for this detector server\n"));
+            exit(EXIT_FAILURE);
+#endif
+            break;
+
+        case 't':
+#ifdef EIGERD
+            if (sscanf(optarg, "%d", &topCommandLine) != 1) {
+                LOG(logERROR, ("Cannot scan top argument\n%s", helpMessage));
+                exit(EXIT_FAILURE);
+            }
+            if (topCommandLine == 0) {
+                LOG(logINFO, ("Detector Top mode\n"));
+            } else {
+                LOG(logINFO, ("Detector Bottom mode\n"));
+            }
+#else
+            LOG(logERROR, ("No top implemented for this detector server\n"));
+            exit(EXIT_FAILURE);
+#endif
+            break;
+
         case 'h':
             printf("%s", helpMessage);
             exit(EXIT_SUCCESS);