Default to next PLUGIN_ID if not defined

startup.cmd

@@ -10,10 +10,15 @@
 #-###############################################################################
 #-
 #- Arguments
-#- PLUGIN_ID : Id of plugin to load (mandatory)
+#- PLUGIN_ID : Id of plugin to load (optional)
 #-
 #################################################################################
 
 #- Load plugin:
+
 epicsEnvSet(ECMC_PLUGIN_FILNAME,"$(ecmc_plugin_daq_DIR)lib/${EPICS_HOST_ARCH=linux-x86_64}/libecmc_plugin_daq.so")
-${SCRIPTEXEC} ${ecmccfg_DIR}loadPlugin.cmd, "PLUGIN_ID=${PLUGIN_ID}, FILE='${ECMC_PLUGIN_FILNAME}' , CONFIG='NOT USED',REPORT=1"
+ecmcIf("${PLUGIN_ID=-1}=-1")
+${IF_TRUE}${SCRIPTEXEC} ${ecmccfg_DIR}loadPlugin.cmd, "FILE='${ECMC_PLUGIN_FILNAME}' , CONFIG='NOT USED',REPORT=1"
+#else
+${IF_FALSE}${SCRIPTEXEC} ${ecmccfg_DIR}loadPlugin.cmd, "PLUGIN_ID=${PLUGIN_ID}, FILE='${ECMC_PLUGIN_FILNAME}' , CONFIG='NOT USED',REPORT=1"
+ecmcEndIf()