P30P-09A 52 User's manual
Example
: Device identification
Request:
Table 34
Device address
Function
Checksum
01h
11h
C02Ch
Response:
Table 35
Addre
ss
Function Numb
er of
bytes
Device
ID
Device
status
Field dependent on device
Checksum
(CRC)
Firmware v
2.00
Registers 4308,4309, 4310, 4311 describing
serial number, and device configuration of the
transducer (ser. no.: 13100001)
01h
11h
0Ch
C1h
FFh
02h 00h
A0h 01h 6Ch 0Dh A0h 01h 6Ch 0Dh
69FCh
Field dependent on the device
– 4 bytes corresponding to the value of the registers 4308...4311, see
Tab. 42. Production status 1...4.
5.9.4 Interface RS-485 Master mode
RS-485 interface can operate in
Master
mode, when the device can query single connected
slave device. Both devices need to share communication parameters. Master mode is enabled by
selecting the appropriate RS-485 operation mode from the menu:
Mbus 485 Mode Master
→
→
or entering value "2" to register 4042. In Master mode, following parameters have to be configured in
Mbus 485
menu:
Table 36
Item
Mbus 485
1
Address
Queried device address
2
ModeUnit
Transmission mode of a link
3
BaudRate
Baud rate
4
Base.Reg
Base register number
5
No.ofVal
Number of values queried
6
ValType
Type of values queried
7
Interv.
Query time [x100 ms]
8
AnswTime
Maximum response time [ms]
9
Mode
Serial interface operating mode
10
Mast.Fun
Function selection for Master mode (0x03 or
0x04)
11
No.ofErr
Number of query retries when no response is
received