Topic: CM064

C-more Panel Communication Error Codes

When dealing with network communications, Errors will occur.  To simplify the process of identifying a possible Error, the C-more Panels will automatically display an Error Code that helps identify the existing issue.

The Table shown below provides a list of C-more Panel Error Codes that may be displayed by the C-more Panels.  If a C-more communications Error does occur, the Error message will display across the top of the screen.

C-more Panel Error Codes

Error Code

Error Message

Description

PLC-001

PLC Communication Timeout

%Device% PLC Communication Timeout

Timeout occurred after sending request to PLC.  When multi connection such as RS-422, 485. Add to %Device%

%Device% is Device registered by Panel Manager.

PLC-002

NAK received from PLC

A Negative Acknowledgment (NAK) control code has been generated during a read/write request from the PLC.

PLC-003

EOT received from PLC

An End of Transmission (EOT) control code is sent by the PLC in response to a Read/Write/SetBit request.

PLC-004

STX is not found

A Start of Text (STX) control code was not found in the data packet received from the PLC.

PLC-005

ETX or ETB is not found

Neither an End of Text (ETX) or an End of Transmission Block (ETB) control code was found in the data packet received from the PLC.

PLC-006

LRC does not match

There was an incorrect Longitudinal Redundancy Check (LRC) control code in the communications packet received from the PLC.  This is an indication that the data in the packet is corrupted.

PLC-007

CRC does not match

There was an incorrect Cyclic Redundancy Check (CRC) control code in the communications packet received from the PLC. This is an indication that the data in the packet is corrupted.

PLC-008

Address Does

Not Match

The Address value returned in the data packet from the PLC is incorrect.

PLC-009

Different function code received from PLC

The Function Code returned in the data packet from the PLC is incorrect.

PLC-010

Data size does not match

There are Incorrect number of bytes found in the Data returned from the PLC.

PLC-011

Invalid value in function code

There is an Invalid Value in the Function Code.

PLC-012

Invalid Command sent to PLC

There was an Invalid Command sent to the PLC that was not recognized by the PLC.

PLC-013

ENQ received from PLC

If the packet does not include a Negative Acknowledgment (NAK - 0x15 value) in the defined packet field, then an Enquiry (ENQ) control Code Error will be displayed.

PLC-014

Transaction ID Does Not Match

This Error will be displayed if after checking the Transaction ID Bytes in the packet, there is no match to what was requested.

PLC-015

%Device% No device found

A PLC device designated as %Device% could not be found.

PLC-016

Data byte communication Error

0 byte of data is received in data part.

PLC-017

Out of address range

This an AB Protocol Error only.  The Panel sent request of a file number more than 255 to PLC (except PLC5).  C-more support for file numbers more than 255 is only for PLC5.  Other PLCs support is only up to 255.

PLC-018

Panel Communication Timeout

The server panel did not respond when using the Panel Pass Through.

PLC-019

Found in Parity Error by Hardware

An error detected in the PLC memory.

PLC-020

Can't Open Serial Port

Cannot Open the Serial Port.

If this error shows on the Panel, it indicates a Hardware Problem.

PLC-021

PLC Number does not Match

The PLC Number does not match the PLC Number Configured.

PLC-022

Can't Reset DCB

Unable to Reset the Data Communication Bit.

PLC-023

Cable not connected properly

 

PLC-024

Cannot detect other devices on Network

 

PLC-025

Panel not in polling list

 

PLC-026

PLC Connection Timeout

A Timeout occurred after sending a request to PLC.

PLC-027

Memory Type Incorrect

 

PLC-028

PLC Failed to Respond

  • If the PLC Protocol in Panel Manager is AutomationDirect K-sequence, AutomationDirect DirectNet or AutomationDirect Modbus and the PLC Secondary Comm Port configuration has all three protocols enabled (as is the default setting for that port), DISABLE (in DirectSoft) the protocols that are not actually being used.

  • Sometimes occurs because C-more Panel Manager "CPU Slot" is actually a slot containing a 1756-DHRIO "DH+/RIO Module.
  • Sometimes occurs because C-more Panel Manager "CPU Slot" is actually a slot containing a 1756-ENBT.

PLC-029

PLC Memory Version Error

 

PLC-495

Error code %hhhh% (%0xhhhh%) returned from PLC

Indicates an Error Message received from the PLC.  The error code %0xhhhh% can be found in the Error code topic for the PLC manufacturer, listed in Related Topics below.

PLC-496

Error code %0xhhhhhhhh% returned from PLC on EIP

Indicates an Error Message received from the PLC.  The error code %0xhhhh% can be found in the Error code topic for the PLC manufacturer, listed in Related Topics below.

PLC-497

Error code %0xhhhhhh% returned from PLC on CIP

 Indicates an Error Message received from the PLC.  The error code %0xhhhh% can be found in the Error code topic for the PLC manufacturer, listed in Related Topics below.

PLC-498

Error code %0xhhhhhh% returned from PLC on Service

 Indicates an Error Message received from the PLC.  The error code %0xhhhh% can be found in the Error code topic for the PLC manufacturer, listed in Related Topics below.

PLC-499

Error code %0xhhhh% returned from PLC

Indicates an Error Message received from the PLC.  The error code %0xhhhh% can be found in the Error code topic for the PLC manufacturer, listed in Related Topics below.

PLC-500

Can not write to Serial Port

Data cannot Write to the Serial Port.

Data was sent to the PLC via the Serial Port.  If this error shows on the Panel, it indicates a Hardware Problem.

PLC-700

Not enough buffer memory

There was an Error while allocating Memory for the Read Buffer.  When this Error is displayed, a Memory leak may have occurred.

PLC-701

Access to inaccessible PLC memory

Request to Inaccessible Memory from the HMI layer to the PLC protocol layer.  This Error is an indication that there is a problem in the HMI layer.

PLC-702

Cannot access by different function code

A Read/Write/SetBit request has been sent to an Invalid Memory area.  This Error is an indication that there is a problem in the HMI layer.

PLC-703

Write request to PLC read only memory

A PLC Write request was made to the PLCs Read-Only Memory area.  This Error is an indication that there is a problem in the HMI layer or the PLC protocol layer.

PLC-704

Bad device-access

No device (PLC) exists in the server panel or the device name does Not match between the server and client when using the Panel Pass Through.

PLC-705

Protocol does not match

The protocol for the device does Not match between the server and client when using the Panel Pass Through.

The PLC-499 Error Code is used to show any Errors that are generated by the connected PLC.  The PLC-499 Error Message includes a four digit hexadecimal value.  This value can be looked up in the specific PLCs Error Tables to determine the cause of the Error.

The Related Topics below provide PLC Error Codes for each of the PLC Protocols supported by C-more Panels.

Related Topics Link IconRelated Topics