Huber KISS 1 Series, Operation Manual

Page: 44 / 56

Interfaces and data communication
OPERATION MANUAL Chapter 6
KISS Immersion Circulator
V1.2.0en/11.12.20//0.3.1
44
6.3.1.1 Command “V” (Verify)
This command is provided to check the presence of a slave and query its ID.
Byte ASCII Hex Description
Master sends: [M01V07C6\r
1. Byte [ 5Bh Start character
2. Byte M 4Dh Master ID
3. Byte 0 30h Slave address
4. Byte 1 31h Slave address
5. Byte V 56h Command qualifier
6. Byte 0 30h Length of data field (0)
7. Byte 7 37h Length of data field (7)
8. Byte C 43h Checksum
9. Byte 6 36h Checksum
10. Byte \r 0Dh End character CR
The checksum is formed from bytes 1 to 7:
5Bh + 4Dh + 30h + 31h + 56h + 30h + 37h = 1C6h = 1 byte sum = C6h
The hex value C6h is appended as two ASCII characters “C” (43h) and “6” (36h).
The slave responds: [S01V14Huber ControlC1\r
The 13 bytes of the data set “Huber Control” plus the 7 bytes in front of the data set result in a data field length
of 20 bytes = 14h bytes.
6.3.1.2 Command “L” (Limit)
This command is used to query the setpoint limits.
Byte ASCII Hex Description
Master sends: [M01L0F********1B\r
The slave responds: [S01L17F4484E20F4484E2045\r
A response always includes four limit values (starting from the eighth byte):
1. Lower setpoint limit (4 bytes),
2. upper setpoint limits (4 bytes),
3. lower working range limit (4 bytes),
4. upper working range limit (4 bytes).
The working range limits are device-specific and cannot be changed. The lower setpoint limit can not
be lower than the lower working range limit and the upper setpoint limit can not exceed the upper
working range limit.
The two bytes before the last byte contain the checksum and the last byte of the response contains
the end character (CR).
Each of the four values is expressed as a hex value. The values are signed, where 1 bit corresponds
to 0.01 K. Thus a number range from 0000h to 7FFFh, i.e. from 0.00 °C to 327.67 C °, can be repre-
sented. Negative numbers are represented from FFFFh to 8000h, i.e. from - 0.01 °C to - 327.66 °C.
Thus the four individual ASCII characters “F448” correspond to a 16-bit hex value of F448h and thus
a temperature of - 30 °C (also see on page 45 Section »Command “G” (General)« ).
Command structure
“V” (Verify)
Command structure
“L” (Limit)