Product specifications

47
Reference Manual
00809-0200-4420, Rev HB
Section 6: Troubleshooting
January 2015
Troubleshooting
Table 6-4. Troubleshooting Modbus Communications
Issue Troubleshooting steps
Can not
communicate
using Modbus RTU
1. Verify the use of RS-485.
2. Verify wiring connections. See Section 3: Mounting and Connection.
3. Verify if termination is required.
4. Verify that Modbus serial communications setting in the Gateway match the
Modbus Host settings. Log on to the Gateway and navigate to SETUP >
MODBUS > COMMUNICATIONS.
5. Verify the Modbus address for the Gateway.
6. Verify Modbus register mapping in the Gateway. Log on to the Gateway and
navigate to SETUP > MODBUS > MAPPING.
Can not
communicate
using Modbus TCP
1. Verify secure / unsecure Modbus protocol settings in the Gateway. Log on to
the Gateway and navigate to SETUP > SECURITY > PROTOCOLS.
2. Verify the Modbus TCP communications settings in the Gateway. Log on to
the Gateway and navigate to SETUP > MODBUS > COMMUNICATIONS.
3. Verify Modbus register mapping in the Gateway. Log on to the Gateway and
navigate to SETUP > MODBUS > MAPPING.
Can not
communicate
using secure
Modbus TCP
1. Verify the Security Setup Utility has been installed.
2. Configure a Secure Modbus Proxy for the Gateway. See Section 4: Software
Setup
.
3. Verify secure / unsecure Modbus protocol settings in the Gateway. Log on to
the Gateway and navigate to SETUP > SECURITY > PROTOCOLS.
4. Verify the Modbus TCP communications settings in the Gateway. Log on to
the Gateway and navigate to SETUP > MODBUS > COMMUNICATIONS.
5. Verify Modbus register mapping in the Gateway. Log on to the Gateway and
navigate to SETUP > MODBUS > MAPPING.
Table 6-5. Troubleshooting OPC Communications
Issue Troubleshooting steps
OPC application
can not find a
Gateway OPC
server
1. Verify the Security Setup Utility has been installed on the same PC as the OPC
application.
2. Configure an OPC proxy for the Gateway. See Section 4: Software Setup.
Gateway OPC
server does not
show any Gateways
1. Configure an OPC proxy for the Gateway. See Section 4: Software Setup.
Gateway OPC
server does not
show any data tags
1. Configure the Gateway OPC Browse Tree. Log on to the Gateway and navigate
to SETUP > OPC > OPC BROWSE TREE.
2. Verify the connection status for the OPC proxy in the Security Setup Utility.
3. Verify if the OPC proxy is configured for secure or unsecure communications.
4. Verify secure / unsecure OPC protocol settings in the Gateway. Log on to the
Gateway and navigate to SETUP > SECURITY > PROTOCOLS.
5. Verify network firewall and port settings.