Watlow PPC-2000 - Manual (Page 179)

PPC-2000 User’s Guide Chapter 4: Troubleshooting
Doc.# 30002-00 Rev 2.3 Watlow Anafaze 153
PPC-206x Digital Out
Refer to the following descriptions of LED indicators when
troubleshooting the digital output module.
• Green Status LED remains off, on, or blinks
incorrectly: When the module is correctly functioning the
green LED blinks. If the LED remains off, on, or blinks
incorrectly, the module may not be functioning correctly.
Corrective Actions:
Make sure the rotary switch is set to the proper module ad-
dress. Each module must have a unique address.
Cycle power to PPC-2000 system.
Check that the modules are connected properly; refer to
Module Assembly on page 24.
Perform a RAM clear; refer to Resetting Closed-Loop
Control Parameters on page 156.
Replace the module.
• Green Status LED is blinking but outputs are not
functioning correctly:
Corrective Actions:
Check to make sure the I/O wiring is correct. See Con-
necting to the Relay Outputs on the PPC-206x on page 70.
Check to make sure the digital outputs are correctly con-
figured. See Digital Inputs and Outputs on page 154.
PPC-207x Digital In
Refer to the following descriptions of LED indicators when
troubleshooting the digital input module.
• Green Status LED remains off, on, or blinks
incorrectly: When the module is correctly functioning the
green LED blinks. If the LED remains off, on, or blinks
incorrectly, the module may not be functioning correctly.
Corrective Actions:
Make sure the rotary switch is set to the proper module ad-
dress. Each module must have a unique address.
Cycle power to PPC-2000 system.
Check that the modules are connected properly; refer to
Module Assembly on page 24.
Perform a RAM clear; refer to Resetting Closed-Loop
Control Parameters on page 156.
Replace the module.
• Green Status LED is blinking but inputs are not
working correctly:
Corrective Actions:
Check to make sure the I/O wiring is correct. See Con-
necting Digital Inputs to the PPC-207x on page 74.