Troubleshooting Modbus Communications; Table 8-14 Troubleshooting Modbus Communications - Honeywell DR4300 Product Manual

8.5.10 Troubleshooting Modbus Communications

Procedure
Table 8-14 explains what to do if Modbus communications are not successful.
Step
Verify that communications are enabled.
1
2 Check that the configured baud rate is
correct.
3 Check that the device address is correct.
Each address must be unique. A
recorder with two pens must have a
unique address for each pen channel.
Check that the communication wires are
4
properly connected to the J3 connector
on the communication printed circuir
assembly (PCA).
Verify that the communcation cable
5
connects J2 on the communication PCA
to J3 on the PCA for Pen 1. The PCA for
Pen 1 is on the right when facing the
recorder.
If communication is used for Pen 2,
another communication cable must
connect J1 on the communication PCA
with J3 on the PCA for Pen 2.
6 Replace the communication PCA.
4/00

Table 8-14 Troubleshooting Modbus Communications

What to do
DR4300 Circular Chart Recorder Product Manual
Troubleshooting and Pen Alignment
of Recorder with Display
How to do it or
where to find the instructions
Refer to Section 4 - Configuration, Startup, and
Operation of Recorder with Display.
Refer to Section 4 - Configuration, Startup, and
Operation of Recorder with Display.
Refer to Section 4 - Configuration, Startup, and
Operation of Recorder with Display.
Refer to Section 2 - Installation.
Refer to Section 9 - Replacing Hardware
Assemblies.
Refer to the replacement pocedure in Section 9 -
Replacing Hardware Assemblies.
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