diff --git a/euro2kdriv.c b/euro2kdriv.c
index 43317e0..0979973 100644
--- a/euro2kdriv.c
+++ b/euro2kdriv.c
@@ -91,6 +91,7 @@ static int Euro2kMakePar(void *object, void *userarg, int argc, char *argv[])
     *last = par;
     par->unit = NULL;
     par->fmt = NULL;
+    par->par = PAR_NAN;
   } else {
     if (par->unit) {
       free(par->unit); par->unit=NULL;
diff --git a/ilmdriv.c b/ilmdriv.c
index 1ac668a..9af6ec7 100644
--- a/ilmdriv.c
+++ b/ilmdriv.c
@@ -27,14 +27,18 @@ Markus Zolliker, April 2005
 #include "fsm.h"
 #include "initializer.h"
 
+/*
 typedef enum { ALWAYSNEW, NEW, MEASURING, NOTYETREAD, OLD } ReadState;
+*/
 typedef enum { UNUSED, N2, PULSED_HE, CONTINOUS_HE, CHANNEL_ERROR = 9 } Usage;
 
 typedef struct {
   EaseBase b;
   float lev[3];
   Usage usage[3];
+/*
   ReadState readState[3];
+*/
 } Ilm;
 
 static ParClass ilmClass = { "ILM", sizeof(Ilm) };
@@ -49,23 +53,21 @@ static void IlmParDef(void *object) {
   if (drv->usage[0]) {
     ParFmt("%.1f"); ParTail(tails[drv->usage[0]]);
   }
-  if (drv->readState[0] == NEW) {
-    ParLogReady(PAR_NOW_READY);
-  }
+  /* if (drv->readState[0] == NEW) ParLogReady(PAR_NOW_READY); */
   ParFloat(&drv->lev[0], PAR_NAN);
   
   ParName("lev2");
   if (drv->usage[1]) {
     ParFmt("%.1f"); ParTail(tails[drv->usage[1]]);
   };
-  if (drv->readState[1] == NEW) ParLogReady(PAR_NOW_READY);
+  /* if (drv->readState[1] == NEW) ParLogReady(PAR_NOW_READY); */
   ParFloat(&drv->lev[1], PAR_NAN);
   
   ParName("lev3");
   if (drv->usage[2]) {
     ParFmt("%.1f"); ParTail(tails[drv->usage[2]]);
   }
-  if (drv->readState[2] == NEW) ParLogReady(PAR_NOW_READY);
+  /* if (drv->readState[2] == NEW) ParLogReady(PAR_NOW_READY); */
   ParFloat(&drv->lev[2], PAR_NAN);
   EaseBasePar(drv);
   EaseSendPar(drv);
@@ -93,14 +95,18 @@ static void IlmStatus(Ilm *drv) {
     }
     drv->usage[i] = ans[i+1] - '0';
     if (drv->usage[i] == PULSED_HE) {
+      /*
       sscanf(ans+6+2*i, "%1x", &status);
-      if (status & 1) { /* measuring */
+      if (status & 1) { // measuring
         drv->readState[i] = MEASURING;
-      } else if (drv->readState[i] == MEASURING) { /* new value */
+      } else if (drv->readState[i] == MEASURING) { // new value
         drv->readState[i] = NOTYETREAD;
       }
+      */
     } else {
+      /*
       drv->readState[i] = ALWAYSNEW;
+      */
     }
   }
   return;
@@ -117,37 +123,46 @@ static long IlmRead(long pc, void *object) {
     IlmStatus(drv); /* check for errors */
     EaseWrite(eab, "R1"); /* read sensor 1 */
   return __LINE__; case __LINE__: /**********************************/
-    if (drv->readState[0] != MEASURING) {
-      drv->lev[0] = OxiGet(eab, 1, NULL, drv->lev[0]);
-    }
+    /* if (drv->readState[0] != MEASURING) */
+    
+    drv->lev[0] = OxiGet(eab, 1, NULL, drv->lev[0]);
+    
+    /*
     if (drv->readState[0] == NOTYETREAD) {
       drv->readState[0] = NEW;
     }
-    
+    */
+
     if (drv->usage[1] == 0) goto skip2;
     EaseWrite(eab, "R2"); /* read sensor 2 */
   return __LINE__; case __LINE__: /**********************************/
     drv->lev[1] = OxiGet(eab, 1, NULL, drv->lev[1]);
+    /*
     if (drv->readState[1] == NOTYETREAD) {
       drv->readState[1] = NEW;
     }
+    */
   skip2:
   
     if (drv->usage[2] == 0) goto skip3;
     EaseWrite(eab, "R3"); /* read sensor 3 */
   return __LINE__; case __LINE__: /**********************************/
     drv->lev[2] = OxiGet(eab, 1, NULL, drv->lev[2]);
+    /*
     if (drv->readState[2] == NOTYETREAD) {
       drv->readState[2] = NEW;
     }
+    */
   skip3:
-  
+
     if (ParLog(drv) >= 0) { /* logging was done */
+      /*
       for (i=0; i<3; i++) {
         if (drv->readState[i] == NEW) {
           drv->readState[i] = OLD;
         }
       }
+      */
     }
   return 0; } /* FSM END ********************************************/
 
diff --git a/pardef.c b/pardef.c
index 3e5a043..27445a2 100644
--- a/pardef.c
+++ b/pardef.c
@@ -432,7 +432,7 @@ static int ParExecute(SConnection *con, SicsInterp *sics, void *object, int argc
       ctx->argc = argc - 3;
       ctx->argv = argv + 3;
       ctx->doit = toupper(argv[1][0]) != 'U';
-      ctx->exact = 1;
+      ctx->exact = 0;
       ParDo(con, o, PAR_LOGSWITCH, argv[2]);
     }
   } else if ((0 == strcasecmp(argv[1], "save") || 0 == strcasecmp(argv[1], "unsave"))) {
@@ -603,7 +603,7 @@ void ParFind(void) {
 long ParText2Int(char *text) {
   long num = 0;
 
-  if (strcasecmp(text, "undefined") == 0) {
+  if (strcasecmp(text, "undefined") == 0 || text[0] == '\0') {
     return PAR_LNAN;
   }
   if (ctx->enumList) {
@@ -622,7 +622,7 @@ char *ParInt2Text(int num) {
   static char buf[12];
   
   if (num == PAR_LNAN) {
-    return "undefined";
+    return ""; /* undefined */
   }
   if (! ctx->enumList) return NULL;
   for (i = 0; i <= num; i++) {
@@ -686,7 +686,7 @@ void ParName(char *name) {
     ctx->access = -1;
     ctx->doit = -1;
     ctx->logName = ""; /* log by default */
-    ctx->exact = 1; /* exact by default */
+    ctx->exact = 0; /* not exact by default */
     return;
   case PAR_GET:
     if (0 != strcasecmp(name, ctx->thisPar)) {
@@ -926,7 +926,7 @@ void ParOut(char *buf) {
       } else {
         p == NULL;
       }
-      if (p == NULL) p = "undefined";
+      if (p == NULL) p = ""; /* undefined */
       ParPrintf(NULL, eValue, "%s", p);
       break;
     }
@@ -1063,7 +1063,7 @@ void ParFloat(float *value, float defValue) {
   case FMT_OP:
     if (*value == PAR_NAN) {
       ctx->fmt = NULL;
-      ParOut("undefined");
+      ParOut(""); /* undefined */
     } else {
       if (ctx->fmt == NULL) {
         ctx->fmt = "%#.5g";
@@ -1110,7 +1110,7 @@ void ParInt(int *value, int defValue) {
     /* fall through */
   case FMT_OP:
     if (*value == PAR_LNAN) {
-      ParOut("undefined");
+      ParOut(""); /* undefined */
     } else {
       snprintf(buf, sizeof buf, "%d", *value);
       ParOut(buf);
@@ -1145,6 +1145,7 @@ void ParStr(char **value, char *defValue) {
     ParOut(*value);
     break;
   case INIT_OP:
+    ctx->exact = 1;
     if (defValue != NULL) {
       *value = strdup(defValue);
     }
@@ -1170,6 +1171,7 @@ void ParFixedStr(char *value, int maxsize, char *defValue) {
     ParOut(value);
     break;
   case INIT_OP:
+    ctx->exact = 1;
     if (defValue != NULL) {
       snprintf(value, maxsize, "%s", defValue);
     }
diff --git a/tecs/tecs.c b/tecs/tecs.c
index cf48b3f..29979a9 100644
--- a/tecs/tecs.c
+++ b/tecs/tecs.c
@@ -1399,8 +1399,8 @@ void CalcMaxPower(void) {
     maxCurrent = 1; /* must be 1 for Power2Percent */
     h=Power2Percent(maxPowerFlt)/100;
     p=h*h*resist; /* power before amplifier */
-    plim=2500/resist;
-    /* power limited by 50 V output. U*U/R=2500/R */
+    plim=3025/resist;
+    /* power limited by 55 V output. U*U/R=55*55/R */
     if (p>plim) p=plim;
     pa=resist*4; /* max. maxPower R*I*I (I=2 A) */
     low.p = 0;
@@ -1625,7 +1625,7 @@ int ConfigAlarms(float genLimit) {
       ERR_P(LscCmd(ser, "ALARM [buf1]:1,1,[r1],0,1,1"));
       alarmList[k]=s->ch;
       k++;
-    } else {
+    } else if (i != 4) { /* do not switch off A0 alarm */
       ERR_P(LscCmd(ser, "ALARM [buf1]:0")); /* switch off unused alarms */
     }
   }
@@ -2630,12 +2630,18 @@ int DeviceHdl(int mode, void *base, int fd) {
 }
 
 int PidHdl(int mode, void *base, int fd) {
+  char oldpid[128];
+
   if (mode==COC_WR) {
     return COC_DWR;
   } else if (mode==COC_DWR) {
-    ERR_P(LscCmd(ser,"PID [loop]:[prop],[integ],[deriv]"));
+    assert(sizeof oldpid == sizeof pid);
+    strcpy(oldpid, pid);
     PidSumHdl(COC_RD, base, fd);
-    logfileOut(LOG_MAIN, "pid: %s\n", pid);
+    if (strcmp(oldpid, pid) != 0) {
+      ERR_P(LscCmd(ser,"PID [loop]:[prop],[integ],[deriv]"));
+      logfileOut(LOG_MAIN, "pid: %s\n", pid);
+    }
   }
   return 0;
   OnError: return -1;
diff --git a/tecs/tecs_logger.c b/tecs/tecs_logger.c
index 5cd77e4..527d0a6 100644
--- a/tecs/tecs_logger.c
+++ b/tecs/tecs_logger.c
@@ -1,2 +1,2 @@
 #define TECS_LOG 1
-#include "../logger.c"
+#include "../../logger.c"
diff --git a/tecs/term.c b/tecs/term.c
index 752d8d0..84c49bb 100644
--- a/tecs/term.c
+++ b/tecs/term.c
@@ -13,7 +13,7 @@
 #include "sys_select.h"
 
 #define ESC_TMO 1000
-#define REF_TMO 100
+#define REF_TMO 50
 #define HISTORY_LINES 256
 
 #define L_ARROW 0200