Troubleshooting; 1: What Are Some Basic Guidelines When Installing A Cgw-Mb; 2: How Fast Can The Modbus Client Poll The Clss Gateway Mainboard; 3: How Can I Tell If The Clss Gateway Mainboard Is Running - Honeywell CGW-MB Installation And User Manual

Troubleshooting

7.24 Troubleshooting
7.24.1 What are some basic guidelines when installing a CGW-MB?
• Polling should be done slowly to start.
• Use Modscan ® to debug the system rather than a more complicated client. Verify that
registers are being updated as events happen on the NFN network/panel.
• Make sure CLSS Gateway mainboard can be pinged from the same computer on
which the client application is being installed.
• Check and double check the power supplies as well as all cabling.
• Make sure the client supports Unit IDs.
• Stop the client from sending a subsequent request until after it receives a response
from the CLSS Gateway mainboard.
• Make sure the client accepts all exception responses. Including 0xA and 0xB.
• Use Wireshark ® to debug IP traffic.
• Be sure only one client is polling the CLSS Gateway mainboard.
• Check the CGW-MB configuration tool and be sure that the Authorized Client IP
address is set to 0.0.0.0. If using the Authorized Client IP security feature, confirm that
the address in the CLSS Gateway mainboard matches the address in the Modbus
client.
7.24.2 How fast can the Modbus client poll the CLSS Gateway mainboard?
The polling rate is a function of several variables. Some issues that will determine the
maximum poll rate are:
• The size of the NFN network that is being monitored.
• The number of points on the panels.
• The event activity on the NFN network/panel (i.e. VeriFire downloads).
• Requests for analog values are much slower than other requests
• If only a partial response form the CLSS Gateway mainboard is seen in the Modbus
client, try increasing the "response time out" value in the client to a larger value. If the
value is set to 5 seconds or more, this should be adequate. The exact response time
out will depend on IP network delays and routing. On a small IP network, the CLSS
Gateway mainboard responds to a read of 100 register in less than 1 second.
The CLSS Gateway mainboard also has some processing overhead in order to do such
things as maintain the registers.
7.24.3 How can I tell if the CLSS Gateway mainboard is running?
• Ping the CLSS Gateway mainboard from the computer on which the Modbus client is
running.
• Use Wireshark to analyze the data on the IP network.
• Modscan was one tool that was used during development to test the CLSS Gateway
mainboard. It is designed primarily as a testing device for verification of correct
protocol operation in new or existing systems.
7.24.4 How do I recover a lost password from the CLSS Gateway mainboard?
If the password for the CLSS Gateway mainboard is lost, programming changes cannot be
made. In this situation, the CLSS Gateway mainboard settings must be reset.
7.24.5 What is an "initialization read" for analog values?
This is the first read of up to 10 analog values from a 4–20 mA module. This first read tells the
CLSS Gateway mainboard that it should begin a polling routine for the analog values in this
request. The first response from the initialization will usually be all zeros. Subsequent responses will
have the actual values.
CGW-MB Installation and Users' Manual | P/N:LS10248-000HW-E | REV.G | JUL/31/2022
Table 7.35: Read Device Identification (Ox2B/OxOE)
0x06 UserApplicationName
0x07 MappingVersion
Modbus Communications
Modbus CLSS
Gateway mainboard
V1.0 (Example)
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