GHM Delta OHM HVAC40 Series, Руководство по эксплуатации

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HVAC40…
- 12 -
V1.1
3.5 C
ONFIGURATION VIA THE SERIAL PORT
1) HVAC4017T…, HVAC40A17T…, HVAC40V17T… and HVAC40R17T… models
Connect the COM AUX serial port of the instrument to the RS232 (via the RS27
cable) or USB (via the cable CP27) port of the PC. If the CP27 cable is used, in-
stall the USB drivers on your PC.
HVAC40S17T… models
Connect the RS485 output of the instrument to the RS232 (via a RS485/RS232
converter) or USB (via a RS485/USB converter, for example the RS48 cable) port
of the PC. If a RS485/USB converter is used, install the USB drivers on your PC.
2) On the PC, launch a standard serial communication software and set the baud rate
to 115200, the communication parameters to 8N2 and the COM port number to
which the instrument is connected.
3) Only for HVAC40S17T… models, power cycle the instrument and send the com-
mand @ within 10 seconds from the instrument power on.
4) If necessary, send the CAL START command. The CAL START command enables
the use of some commands, specified in the tables below. The command
CAL START is automatically disabled after 5 minutes of inactivity or if the CAL END
command or an incorrect command is sent.
5) Send the setting or reading commands given below.
6) Only for HVAC40S17T… models, power cycle the instrument to restore the
MODBUS-RTU protocol.
Serial commands
Instrument general information
Command Description
G0 Reads the instrument model
If the instrument has analog output, the instrument model is followed by the cur-
rent output setting (output lower analog value and temperature range associated
with the output)
Example of reply: HVAC40A17TC.2_4 -20 / 80 °C (output lower analog value = 4
mA, temperature range associated with the output = -20 / 80 °C
GF Similar to G0, but provides the configuration of the analog output set via serial
GS Similar to G0, but provides the configuration of the analog output set via dip
switches
G2 Reads the instrument serial number
G3 Reads the instrument firmware version
G4 Reads the instrument firmware date