Formats 1, 2 (Got-A900 Series Microcomputer Connection) - Mitsubishi Electric GT14 User Manual

61.5.3 Formats 1, 2 (GOT-A900 Series microcomputer connection)


Basic format of data communication
Item
Request message
(host GOT)
(1) During processing of read commands
Response message
during normal
communication
(GOT host)
(2) During processing of write commands
(format 1: GOT-A900 Series microcomputer connection (format 1))
Response message
during faulty
communication
(GOT host)
(format 1: GOT-A900 Series microcomputer connection (format 1))
During interrupt
output
*1 Set the number of interrupt data bytes at "Communication Details Settings" on GT Designer3.
For the setting of the number of interrupt data bytes, refer to the following.
61 - 22
61. MICROCOMPUTER CONNECTION (SERIAL)
61.5 Message Formats
STX Command
02
H
(H) (L)
Sum check is performed in this range.
STX
02
H
Sum check is performed in this range.
NAK
15
H
Output value
1/2/4
*1
bytes
61.6.1 Setting communication interface (Communication settings)
Message Formats
Data ETX
03
H
Sum
Data ETX
Check
03
H
(H) (L)
ACK
06
H
(format 2: GOT-A900 Series microcomputer connection (format 2))
(format 2: GOT-A900 Series microcomputer connection (format 2))
STX
Output value
02
H
Sum check is performed in this range.
Sum
Check
(H) (L)
Error
NAK
Code
15
H
ETX Sum check
1/2/4
03
*1
H
bytes
(H) (L)