P30P-09A 53 User's manual
Parameters 4 - 6 can also be configured via RS-485 (registers 4048-4052) before
Master
mode is selected. After the
Master
mode is selected, transducer cannot be queried by another
Master
device.
All values read in
Master
mode are projected onto the float values and stored in registers
8000...8049, where first value read is put in the register 8000, second one is put in register 8001 etc.
In
Mbus 485
menu you can find the
No.ofErr parameter,
defining allowed number
of retries (number of repeated queries before error is signaled). This parameter is also modifiable via
RS-485 (register 4005) before
Master
mode is selected.
To return the RS-485 interface to the
Slave
mode,
select the desired serial interface mode
from the device menu:
Mbus 485 Mode Slave.
→
→
Fig. 22 Example: P30P transducer in Master mode used to read and store
temperature from external transducer.
5.9.5 Interface RS-485 Monitor mode
RS-485 interface can operate in
Monitor
mode, allowing for monitoring RS-485 network
traffic and react to particular response register of the selected device. P30P has to share the
communication parameters with monitored devices. Serial interface
Monitor
mode is enabled by
selecting the following mode from menu:
Mbus 485 Mode Monitor
→
→
or entering the value “1”
to register 4042. In the
Monitor
mode, configure the following parameters in
Mbus 485
menu:
Table 37
Supply