CEL-MAR ADA-4040PC6, Руководство пользователя

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Byte no Designation Size Value [hex]
04 CRC-Hi 1-Byte
8.4.1.3. READOUT UTC TIME FROM ZDA SENTENCE WITH 16-BIT REGISTER [4X / 3X-
REFERENCES]
0x03 / 0x04 function are used for readout of converter registers value.
Example queries MODBUS-RTU about UTC time hours and minutes from ZDA sentence are shown below.
Query about UTC TIME register with ZDA sentence
Byte no Designation Size Value [hex]
00 Converter address 1 Byte
11 [ 11 to F7]
01 Function code 1 Byte 03 / 04
02 Register address Hi 1 Byte 00
03 Register address Lo 1 Byte
01
04 Registry number Hi 1 Byte
00
05 Registry number Lo 1 Byte
01
06 CRC-Lo 1 Byte ---
07 CRC-Hi 1 Byte ---
Example. Query of UTC time from ZDA sentence from register address 40002 / address 30002
11-03-00-01-00-01-CRCLo-CRCHi
11-04-00-01-00-01-CRCLo-CRCHi
Response with register value UTC TIME from ZDA sentence
Byte no Designation Size Value [hex]
00 Converter address 1-Byte 11 [ 11 to F7]
01 Function code 1-Byte
03 / 04
02 Error code N-Byte
02
03 Dane1-Hi 1-Byte
0E
04 Dane1-Lo 1-Byte 24
05 CRC-Lo 1-Byte ---
06 CRC-Hi 1-Byte
---
Example. Readout of UTC time from ZDA sentence from register address 40009 / address 30009
11-03-02-0E-24-CRCLo-CRCHi
11-04-02-0E-24-CRCLo-CRCHi
In respond UTC time, hours and minutes from ZDA sentence is presented as 2-byte with values:
UTC HHMM = 0x0E24 => Hour=0x0E=14, minutes=0x24=36
Response – in case of error
Byte no Designation Size Value [hex]
00 Converter address 1-Byte
11 [ 11 to F7]
01 Function code 1-Byte 83 / 84
02 Error code 1-Byte 01 – unknown function
02 – unknown data address
03 – unknown data value
04 – NMEA0183 device not respond or is faulty
03 CRC-Lo 1-Byte
04 CRC-Hi 1-Byte
8.5. EXCEPTIONS OF THE MODBUS-RTU PROTOCOL
ADA-4040PC6 in case of received MODBUS-RTU frame, includes:
- unsupported function,
- unknown data address,
20
ADA-4040PC6