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3. The Binary output point number (last point 1, commonly point 4) will be activated as IVVCACTIVE
and the Binary input –(last input +1) will indicate the status of IVVCACTIVE.
4. The user must send the command (binary output 4) as a heartbeat two times within 30 seconds.
5. The IVVC will become ACTIVE.
6. The user should then set to the Remote Auto Inhibit to ON to block automatic operation.
7. Continue sending the Binary Output 4 command as a Heartbeat.
8. If the Control doesn’t receive any Heartbeat signals within the range set on the Auto-Inhibit Timeout feature, the
IVVC will get deactivated and the Remote Auto-Inhibit will turn off to enable the Automatic Operation to
reestablish
5.6 Troubleshooting Communications Problems
This section explains how to troubleshoot the MJ-5 Communications Module using the front panel LED indicators
and the MJXplorer software. The MJXplorer software allows you to access the communications module parameters
via the MJ-5 Control Panel.
5.6.1
Using MJXplorer to Troubleshoot Communications Problems
The MJXplorer software is a menu-driven application program that allows interfacing to the MJ-5 Communications
Module. Up to three MJ-5 units may be connected at a time. When connecting the Fiber Optic interface to
MJXplorer, the auto repeat function must match the setting in the Configure
Configure MJXplorer menu. See
section 4.3.1 for setting the Fiber Optic interface jumpers.
A Fiber Optic to RS-232 driver/receiver is required in order to perform these tests on the fiber optic interface. The
driver/receiver is an optical to electrical signal converter with an ST connector interface and an RS-232 interface.
Connect the optical side to the fiber optic interface via ST fiber optic patch cords. Connect the RS-232 interface to
the personal computer, Figure 7-9.
Use MJXplorer to help pinpoint communications problems in a system. MJXplorer permits testing of the
MJ-5 communications functions independent of other system components.
Once the physical connections are complete, from the MJ-5 front panel select the “2200NOA” protocol for
connecting to only one panel or select “2200” protocol and set comm addresses for connections to multiple panels.
In addition, match the Comm Parity and Comm Baud with the MJXplorer settings. Use MJXplorer to verify that
data can be retrieved from as well as written to the MJ-5 Control Panel.
