The Modbus TCP Slave Interface performs run-time coercion for all data types.
Discrete data types are coerced according to the following guidelines.
|
Memory Type |
Data Source |
Source Value |
Target Value |
|
0X |
CIMPLICITY |
zero (0) |
0 |
|
CIMPLICITY |
non-zero (!= 0) |
||
|
Modbus master |
0 |
||
|
Modbus master |
0xFF or 0x01 (depends on function code) |
||
|
1X |
CIMPLICITY |
zero (0) |
0 |
|
CIMPLICITY |
non-zero (!= 0) |
Guidelines. Analog data types are
coerced according to the following guidelines.
For analog points with engineering units, the Modbus TCP Slave Interface will use the engineering unit value when converting to/from Modbus data values.
For analog points without engineering units, the Modbus TCP Slave Interface will transfer the raw value.
The Modbus TCP Slave Interface will reject any CIMPLICITY point value outside of the range defined by the Modbus Register Limits.
|
|
Expected Modbus TCP Slave runtime behavior. |
