Micromod MOD: 30ML and Modcell Maintenance for 2001N, 2002N, and 1800R - Manual (Page 57)

MOD30ML and Modcell Maintenance Manual
COMMUNICATIONS
ICN operation is to check the voltage pattern with an oscilloscope. The voltage traces
for a properly functioning ICN are shown in Figure 10.
9. Access the Device Setup display on instrument front panel and verify the following:
• The instrument being tested is set at a different ICN address than the address
switch on the ICN interface board in the link.
• ICN communication is enabled
10. Start the Application Builder software and access the Serial Port Setup menu, Figure 3.2
(see Section 3.2.1 for procedure) or Start ViZapp Software (section 3.3.4) and set the
parameters in the OPC Server Device Properties. Select the serial port that is connected
to the link and confirm that the port settings match the link configuration. If uncertain of
the link configuration, select the default configuration parameters from Table 3.
11. Access the Communications Setup menu, Figure 3.5 (see Section 3.2.2 for procedure).
Set the Communication Type to Link . Set the ICN number and Instrument address to
match the values determined in Step 4 or 5.
12. Access the Instrument Status Display and click on the command line at the bottom of the
screen. Type R VERSION and click on Enter. This command returns the version of any
instrument connected to the ICN , even MOD 30. If the instrument responds, confirm that
the reported version agrees with the type of instrument that is being tested. The version
return data is listed in Section 3.4.3.
13. If you are unable to establish communications in Step 12 proceed as follows:
• If you are unsure of the link configuration, first access the Serial Port Setup menu
again and change the baud rate to another setting. In most cases, the link is set
at 9600 or 19200. try to communicate again via the R VERSION command
• If the problem still exists, change the parity setting. If a Mini Link is being used,
always set the parity at none. The data and stop bits are likely to be set at 8 and
1 respectively and try again.
• If unable to establish communications, disconnect power and remove all analog
and communications modules. Restore power and try to communicate again via
the R VERSION command.
• If the problem still exists, do the following:
• Disconnect power.
• Disconnect all instruments from the ICN, other than the one being tested.
• Restore power and try to communicate again via the R VERSION
command.
• If all previous procedures fail, replace the instrument.
4.2.4
Built-In Modbus Communication
Troubleshoot problems with MOD 30ML built-in Modbus communication as follows:
1. Remove power from the instrument.
2. Verify that the communications jumper is in the correct location for built-in communication
via either RS-232 Modbus or RS-485 Modbus.
3. Verify that a communication module is not installed in slots S9 and S10.
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