Rockwell Automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS - Manual (Page 20)

Publication 2711-6.9 - March 2000
20 Modbus Communications for PanelView Terminals
Modbus Application Report The application printout for Modbus provides the following
information:
•
configuration data
•
tag data
Error Messages and Codes The following tables lists error messages and codes specific to
Modbus communications. For all other messages, refer to the
PanelView Operator Interface manual or the PanelBuilder32 online
help.
PanelBuilder32 Tag Error Messages
Message Recommended Action
Tag Address is invalid, number must be between 0 and 65535. Enter appropriate value (0–65535) in Tag Editor.
Character Array Size is invalid, must be between 1 and 128. Enter appropriate value (1–128) in Tag Editor.
Maximum separation of coil tags in an alarm must be less than
1024 coils. In Alarm Setup, change the alarm callout tags so that their
addresses are within the specified number of coils/registers of
the alarm trigger tag address.
Maximum separation of register tags in an alarm must be less
than 64 registers. In Alarm Setup, change the alarm callout tags so that their
addresses are within the specified number of coils/registers of
the alarm trigger tag address.
All tags in an alarm must reference the same network node
address. In Alarm Setup, change the alarm trigger tag and
corresponding alarm callout tags to correct the error condition.
All tags in an alarm must have the same Modbus address type. In Alarm Setup, change the alarm trigger tag and
corresponding alarm callout tags to correct the error condition.
All tags in an alarm must be in the same direction to/from the
network node. In Alarm Setup, change the alarm trigger tag and
corresponding alarm callout tags to correct the error condition.
There cannot be more than one tag in an alarm if the data
direction is to the network node. In Alarm Setup, change the alarm trigger tag and
corresponding alarm callout tags to correct the error condition.
Cannot write to an input register or input status address. Use an output tag for an object or change the tag
addresses in the Tag Editor to an output register or coil.
Not enough network address space to support a tag of this
data type. Change the tag address to reference a lower numbered
discrete address or register.