EZ EZ-220, Hardware Manual

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C-10
Text Panel Hardware Manual
0x0004 Communications Error
This error occurs when there is an error involving communications between the panel and PLC. A
communications error results from one of the following: no or bad physical connection between panel and
PLC, bad checksum in reply from the PLC, bad checksum in command from the panel, bad command from
the panel, bad format of command from the panel, or unexpected reply from the PLC.
0x0010 Invalid Write - Panel register : xxxx
This error will occur when an attempt to write to a read only MFX element. The panel register xxxx contains
the address of the MFX element that is read-only.
0x0020 PLC Message Time-out
This message occurs when the unit does not receive a reply to its command. The unit will retry a command
and wait for the specifi ed time-out period before reporting this command.
0x0040 Invalid PLC attributes - using defaults
This error is reported when the PLC driver receives an invalid set of PLC attributes. The default attributes
will be used when this error occurs.
Timeouts
The timeout time specifi es the amount of time the panel will wait for a reply to a message before triggering
an error. Each message sent to the PLC must be acknowledged by the PLC. The acknowledgment
must be received within the time-out period. If the acknowledgment is not received the driver will retry the
command. After the message has been sent twice with no response, the time-out error message will be
posted.
MODICON PLC WITH MODBUS RTU PROTOCOL
0x0000 No error
0x0001 Incompatible Revision
This error will be displayed when the driver and exec have an incompatible revision.
0x0002 Limit of elements per screen exceeded
This occurs when there are too many registers on the display to be monitored. The number of registers on
the display must be reduced.
0x0004 Reply received from invalid slave nnn
If the driver received a message from a PLC with address nnn when one was not expected.
0x0008 Invalid Checksum Received
This error occurs when a message with an invalid checksum is received by the unit.
0x0010 Incorrect Reply
The driver received an incorrect or unexpected reply from the PLC with address nnn.
0x0020 Error - PLC nnn - <error>
The driver received a Modbus message exception code from the PLC. The <error> strings are: