diff --git a/PS300/PS300-IOC-01App/src/build.mak b/PS300/PS300-IOC-01App/src/build.mak
index e43786763..b356d27ae 100644
--- a/PS300/PS300-IOC-01App/src/build.mak
+++ b/PS300/PS300-IOC-01App/src/build.mak
@@ -29,6 +29,7 @@ $(APPNAME)_DBD += calcSupport.dbd
 $(APPNAME)_DBD += asyn.dbd
 $(APPNAME)_DBD += drvAsynSerialPort.dbd
 $(APPNAME)_DBD += drvAsynIPPort.dbd
+$(APPNAME)_DBD += drvPrologixGPIB.dbd
 $(APPNAME)_DBD += luaSupport.dbd
 $(APPNAME)_DBD += stream.dbd
 ## add other dbd here ##
diff --git a/PS300/iocBoot/iocPS300-IOC-01/config.xml b/PS300/iocBoot/iocPS300-IOC-01/config.xml
index 992b3ab8e..2ff7baeae 100644
--- a/PS300/iocBoot/iocPS300-IOC-01/config.xml
+++ b/PS300/iocBoot/iocPS300-IOC-01/config.xml
@@ -5,6 +5,7 @@
 		<ioc_details>IOC to control the Stanford powersupply 300 series IOCs</ioc_details>
 		<macros>
 			<macro name="PORT" pattern="^COM[0-9]+$" description="Serial COM port" hasDefault="NO" />
+			<macro name="IPADDR" pattern="^[0-9]+\.[0-9]\.+[0-9]\.+[0-9]+$" description="IP Address of prologix GPIB" hasDefault="NO" />
 			<macro name="MODEL" pattern="^[0-9]{3}((_neg)|(_pos))*$" description="Serial COM port" hasDefault="YES" defaultValue="350_pos"/>
 		</macros>
 		<pvsets>
diff --git a/PS300/iocBoot/iocPS300-IOC-01/st-common.cmd b/PS300/iocBoot/iocPS300-IOC-01/st-common.cmd
index d1b1a56f9..889349da7 100644
--- a/PS300/iocBoot/iocPS300-IOC-01/st-common.cmd
+++ b/PS300/iocBoot/iocPS300-IOC-01/st-common.cmd
@@ -4,24 +4,32 @@ epicsEnvSet "DEVICE" "L0"
 ##ISIS## Run IOC initialisation 
 < $(IOCSTARTUP)/init.cmd
 
+stringiftest("GPIB", "$(IPADDR=)", 3)
+stringiftest("SERIAL", "$(PORT=)", 3)
+
 ## Device simulation mode IP configuration
 $(IFDEVSIM) drvAsynIPPortConfigure("$(DEVICE)", "localhost:$(EMULATOR_PORT=57677)")
 
 ## For recsim:
 $(IFRECSIM) drvAsynSerialPortConfigure("$(DEVICE)", "$(PORT=NUL)", 0, 1, 0, 0)
 
-## For real device:
-$(IFNOTDEVSIM) $(IFNOTRECSIM) drvAsynSerialPortConfigure("$(DEVICE)", "$(PORT=NO_PORT_MACRO)", 0, 0, 0, 0)
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "baud", "$(BAUD=9600)")
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "bits", "$(BITS=8)")
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "parity", "$(PARITY=none)")
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "stop", "$(STOP=1)")
+## For real RS2323 serial device:
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) drvAsynSerialPortConfigure("$(DEVICE)", "$(PORT=NO_PORT_MACRO)", 0, 0, 0, 0)
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "baud", "$(BAUD=9600)")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "bits", "$(BITS=8)")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "parity", "$(PARITY=none)")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", -1, "stop", "$(STOP=1)")
 ## Hardware flow control off
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", 0, "clocal", "Y")
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"crtscts","N")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)", 0, "clocal", "Y")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"crtscts","N")
 ## Software flow control off
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"ixon","N")
-$(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"ixoff","N")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"ixon","N")
+$(IFSERIAL) $(IFNOTDEVSIM) $(IFNOTRECSIM) asynSetOption("$(DEVICE)",0,"ixoff","N")
+
+## GPIB prologix
+$(IFGPIB) $(IFNOTDEVSIM) $(IFNOTRECSIM) prologixGPIBConfigure("$(DEVICE)", "$(IPADDR=)")
+$(IFGPIB) $(IFNOTDEVSIM) $(IFNOTRECSIM) prologixGPIBSetOption("$(DEVICE)", "timeout_ms", 2000)
+#$(IFGPIB) $(IFNOTDEVSIM) $(IFNOTRECSIM) prologixGPIBSetOption("$(DEVICE)", "send_eoi", 0)
 
 ## Load record instances