Omron NX-series User Manual page 150

9 TCP/UDP Message Service Function
*1
Parameter
Service code
General status
Size of Addition-
al status
Data
*1. Parameters in the command are in little-endian order.
TCP/IP and UDP/IP Port Number Setting
Refer to A-1-7 TCP/UDP Message Service Settings Display on page A - 13.
Troubleshooting Errors Related to the TCP/UDP Message Service
Use the following information to determine the cause and corrective actions of problems in the
TCP/UDP message service.
Observation
Reading or writing data
is not possible.
An error response is re-
turned by the Communi-
cation Control Unit.
9 - 6
Ad-
Size
dress
(bytes)
offset
5 1 The service code for the destination object that was set
when the command was sent is stored.
For a normal response, the most significant bit in the re-
quested service code is turned ON.
6 1 General status code.
7 1 The number of 16 bit words in additional status array.
8 496 max. If there is no error, the response data is stored here.
If there is an error (General status > 0x00), this parameter
contains the data for the Additional status array.
General status
NOT_ENOUGH_DATA
(0x13)
TOO_MUCH_DATA
(0x15)
Other error codes
NX-series Communication Control Unit Built-in Function User's Manual (Z396)
Description
Causes
The total frame size Specify the frame size value under
is larger than 504 504 bytes.
bytes. The data-field For details, refer to 9-3 TCP/UDP
size value does not Message Service Specifications on
match the actual re- page 9 - 4.
ceived frame size.
The data field size Check the frame size field is calcu-
value does not match lated correctly.
the actual received For details, refer to 9-3 TCP/UDP
frame size. Message Service Specifications on
page 9 - 4.
--- Refer to an appendix of NX-series
Safety Control Unit /
Communication Control Unit User's
Manual (Cat. No. Z395).
Example
of a val-
ue (hex)
8E
00
00
2F00
Corrective action