51
Reference Manual
00809-0200-4410, Rev BA
Section 6: Troubleshooting
February 2014
Troubleshooting
Modbus communications
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 or a pull up is required. See
Figure 3-7
.
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.
OPC communications
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.
EtherNet/IP
The Gateway is not publishing the
parameters
Verify connection is established with EtherNet/IP. Navigate to SETUP > SECURITY >
PROTOCOLS
Reference technical document 00809-0500-4420: Installation manual to connect to an
Allen Bradley system.