Rockwell Automation SA500 Diagnostics, Troubleshooting Guide - Manual (Page 30)

4-10 SA500 Diagnostics, Troubleshooting, and Start-Up Guidelines
4.7.7 I/O Verification
I/O verification consists of ensuring that all physical I/O is properly connected and
functional, and that all critical registers and bits can be accessed in the UDC dual port
memory. Before verifying the I/O, ensure that the following have been loaded to the
AutoMax rack. Note that the application tasks should not be put into run before you
have verified all I/O.
• AutoMax Processor and UDC operating systems
• Rack configuration
• Drive parameters
• All application tasks
The procedures described in the following sections are performed using the Monitor
I/O function in the AutoMax Programming Executive software.
4.7.7.1 Testing UDC/PMI Communication Status
This section describes how to test the UDC/PMI communication status registers. Use
the AutoMax Programming Executive software I/O Monitor function to display the
UDC/PMI Communication Status registers in the format listed in table 4.1.
Step 1. Examine registers 80/1080 and 84/1084 for any errors reported to the UDC
module and PMI related to UDC/PMI communication. If any bits in these
registers are on, try to determine what caused the error.
Step 2. Examine registers 81/1081 and 85/1085 for the number of messages
received by the UDC module and PMI. Over time, this 16-bit value should
increase to its maximum value (32767) and then roll over.
Step 3. Examine registers 82/1082 and 83/1083 (and 86/1086 and 87/1087) for the
number of CRC and format errors received on the UDC module (and PMI). If
either of these values is incrementing, it indicates a problem.
Table 4.1 – UDC/PMI Communication Status Register Formats
Drive
A / B Register Name (format)
80 / 1080 UDC Module Ports A/B Status (binary)
81 / 1081 UDC Module Ports A/B Receive Count (decimal)
82 / 1082 UDC Module Ports A/B CRC Error Count (decimal)
83 / 1083 UDC Module Ports A/B Format Error Count (decimal)
84 / 1084 PMI A/B Status (binary)
85 / 1085 PMI A/B Receive Count (decimal)
86 / 1086 PMI A/B CRC Error Count (decimal)
87 / 1087 PMI A/B Format Error Count (decimal)
88 / 1088 UDC Module Ports A/B Fiber-Optic Link Status (hexadecimal)
89 / 1089 UDC Module Ports A/B Transmitted Message Count (decimal)