Real Time Automation, Inc.
58
1-800-249-1612
a)
Specific to the function code being used for the scan line
4)
N (Slave Address):
a)
Slave address of the slave that the error was received from
5)
A (Starting Address):
a)
Starting address of the register/status that the error was received from
6)
L (Length):
a)
Number of points of the register/status that the error was received from
Example:
This Error Code indicates Error Code 2, the register was not valid. Other details are:
•
Received the error with FC 01, trying to read a single coil for any number of points
•
IP:10.1.50.27 is the address that sent the error.
•
N:1, from device 1. This was setup as Unit ID in Modbus TCP/IP Client page.
•
A:1, Starting address of 1; aka: 000001 or 00001
•
L:16, attempting to read 16 addresses starting at A:1. This is 1 through 16.
The Error Code Indicates
not valid
, so the starting address was not found or there were not 16
sequential coils to be written (1 through 16). To solve this, we need to change the starting address, or
reduce the
# of Points
configured.
