Reading Data - Fuji Electric PXG-9 Communication Instruction Manual

Reading Data

Reading Read-Only Bit Data (Function Code: 02H)
The unit reads bit data continuously for the specified number of bits from the first number to start reading from.
The slaves systematically send the read data in 8-bit units.
When the number of bits to be read is not a multiple of eight, unrelated bits (on the MSB side) all become "0".
Caution
Function Code
Max. No. of Bits to Read in One Message
Relative Address
Coil Number
Message Composition
Command Message (bytes)
Chapter
Station No.
6
Function Code
Number to Start Reading
(Relative Address)
No. of Bits to Read
CRC Data
■ Bit Data to Read List
MSB
0
State of last 1 bit
02H
8 bits
0000H to 000CH
10001H to 10013H
Upper number
Lower number
00H
Lower number
Upper number
Lower number
0 0 0 0 0 0
Master Slave
LSB
0
State of first 1 bit
– 28 –
Reply Message Composition (bytes)
Station No.
Function Code
No. of Bytes to Read (01H)
State of first 8 bits
Upper number
CRC Data
Lower number