Allen-Bradley SLC 500 DeviceNet, User Manual, Page: 99 / 139

Publication 1747-6.5.5 - August 2000
Troubleshooting 7-3
Numeric Display
Code Summary
The 1747-SDN module uses numeric codes to display diagnostic
information about its status. The display flashes at one second
intervals. The following table summarizes the meanings of the
numeric codes.
Table 7.C - Numeric Display Code Summary
Numeric
Code
Description Take this action
0 - 63 Normal operation. The numeric display
indicates the 1747-SDN’s node
address on the DeviceNet network. None.
70 Module failed Duplicate Node Address
check. Change the module channel address to
another available one. The node address
you selected
is already in use on that
channel.
71 Illegal data in scan list table (node
number alternately flashes). Reconfigure the scan list table and
remove any illegal data.
72 Slave device stopped communicating
(node number alternately flashes). Inspect the field devices and verify
connections.
73 Device key parameters do not match
scan list table entry (node number
alternately flashes). Enter a matching scan list device ID.
Make sure that the device at the
flashing node address matches the
desired key parameters (vendor, product
code, product type).
74 Data overrun on port detected. Modify your configuration and check for
invalid data.
75 No scan list is active in the module. Enter a scan list.
76 No direct network traffic for module
detected. None. The module hears other network
communication.
77 Data size returned does not match
scan lists entry (node number
alternately flashes). Reconfigure your module and change
the addressing.
78 Slave device in scan list table does not
exist (node number alternately
flashes). Add the device to the network, or delete
the scan list entry for that device.
79 Module has failed to transmit a
message. Make sure that your module is
connected to a valid network. Check for
disconnected cables. Verify baud rate.
80 Module is in IDLE mode. None.
81 Module is in FAULT mode. None.
82 Error detected in sequence of
fragmented I/O messages from device
(node number alternately flashes). Check scan list table entry for slave
device to make sure that input and
output data lengths are correct. Check
slave device configuration.
83 Slave device is returning error
responses when module attempts to
communicate with it (node number
alternately flashes). Check accuracy of scan list table entry.
Check slave device configuration.
84 Module is initializing the DeviceNet
channel. None. This code clears itself once
module attempts to initialize all slave
devices on the channel.
Numeric
Display