LSIS Master-K K1000S - Execute Monitoring

Chapter 13 RS-232C function of K200S MASTER-K
13-23
13.7.6 Execute monitoring
1) Introduction
This command used for executing the pre-registered monitoring number. When this
command is executed, the PLC returns the contents of devices that are registered with
monitoring number.
2) Request format (External device à PLC)
Format
name
Header
Station
number
Main
instruction
Registration
number
Tail Frame check
Frame
example
ENQ h01 Y (y) h01 EOT BCC
ASCII
value
h05 h3031 h59 (79) h3031 h04
① The registration number should be registered on PLC before executing monitoring.
② BCC : When the main instruction is small character (y), the lower byte of summation
from ENQ to EOT is converted into ASCII format and added to frame as BCC check.
3) Response format (PLC à External device : ACK response)
There are two response formats according to the type of registered format (read single
device or read continuous devices).
① When registered format is reading single device
Format
name
Header
Station
number
Main
instruction
Registration
number
Number
of blocks
Length of
data
Data Tail
Frame
check
Frame
example
ACK h01 Y (y) h01 h02 h02 h9183 ETX BCC
ASCII
value
h06 h3031 h59 (79) h3031 h3032 h3032 h39313833 h03
② When registered format is reading continuous devices
Format
name
Header
Station
number
Main
instruction
Registration
number
Length of
data
Data Tail
Frame
check
Frame
example
ACK h01 Y (y) h01 h04 h9183AABB ETX BCC
ASCII
value
h06 h3031 h59 (79) h3031 h3034 h3931383341414242 h03
1 block
(Max. 16 blocks available)