GE ASTAT Plus - Fieldbus Communication

6. Appendix
6-2-4. Profibus/ DeviceNet
It is possible to connect Astat Plus to an industrial fieldbus system. Only a communications adapter is required. It is also necessary to set
XP to 2.
2 different modules are available: Profibus DP and DeviceNet.
Profibus DP: Cat. Nr.: QCPPDP Ordering Nr.: 129769
DeviceNet:: Cat. Nr.: QCPDNT Ordering Nr.: 129768
Detailed information about these communications adapter is described in the specific product manuals
Astat Plus communicates with this module using Modbus RTU protocol.
ASTAT Modbus RTU Communications Fieldbus
Plus Adapter System
Profibus DP / DeviceNet
max. length 3m.
The available commands between Astat Plus and the Communications Adapter are the ones described in chapter 4.
All data communication with the ASTAT will be done through the fieldbus input and output data areas in the Communication Adapter, being the
address of these areas the following:
- Input data address (= parameter number): 0000h-0079h (0d-121d), used to read parameters
- Output data address (=1000h+parameter number): 1000h-1079h (4096d-4217d), used to write parameters
Examples:
- to read the T parameter (parameter number: 4), the fieldbus master has to read the address: 4
- to set the T parameter to T045, the fieldbus master has to write the number 45d into the address: 4096+4=4100d (1004h).
- to start the unit (parameter number 60d), the fieldbus master has to write 0 into the address: 4096+60=4156d (103Ch)
- to stop the unit (parameter number 60d), the fieldbus master has to write 1 into the address: 4096+60=4156d (103Ch)
Table in section 6-2-5 includes the complete list of parameters and its description
6-8