Chapter 8. Communication Functions
8-16
(3) GM7U main unit response format (ACK response)
Format name
Header
Station No.
Command
Command
type
Tail
Frame check
Frame (Ex.)
ACK
H20
W(w)
SS
ETX
BCC
ASCII
value
H06 H3230
H57(77)
H5353 H03
Item
Description
BCC
When the command is lowercase(r), only one lower byte of the value resulted by adding 1 Byte
each to the ASCII values from ACK to ETX is converted into ASCII and added to BCC, and then
sent.
(4)
GM7U main unit response format (NAK response)
Format name Header
Station
No.
Command
Command
type
Error code
(Hex 2 bytes)
Tail
Frame check
Frame (Ex.)
NAK
H20
W(w)
SS
H4252
ETX
BCC
ASCII value
H15
H3230
H57(77) H5353 H34323532 H03
Item
Description
Frame check
(BCC)
When the command is lowercase(r), only one lower byte of the value resulted by adding 1 Byte
each to the ASCII values from NAK to ETX is converted into ASCII and added to BCC, and then
sent.
Error code
Hex and 2 bytes (ASCII code, 4 bytes) indicate error type. For the details, see 8.1.8 Error codes.
(5)
Example
This example assumes that “HFF” is written in %MW230 of station no.1 and the BCC value is checked.
①
PC request format (PC
→
GM7U main unit)
Format name Header Station
No.
Command
Comm
and
type
No. of
blocks
Device
length
Device name
Data
Tail
Frame
check
Frame (Ex.)
ENQ
H01 w SS H01
H06 %MW230 H00FF
EOT
BCC
ASCII value
H05
H3031
H77
H5353
H3031
H3036 H254D57323330 H30304646 H04
②
For ACK response after execution of command (PC
←
GM7U main unit)
Format name Header Station No.
Command
Command type
Tail
Frame check
Frame (Ex.)
ACK
H01
w
SS
ETX
BCC
ASCII value
H06
H3031
H77
H5353
H03
③
For NAK response after execution of command (PC
←
GM7U main unit)
Format name Header
Station
No.
Command
Command type
Error code
Tail
Frame check
Frame (Ex.)
NAK
H01
w
SS
Error (2)
ETX
BCC
ASCII value
H15
H3031
H77
H5353
Error (4)
H03
Summary of Contents for GLOFA G7M-DR20U
Page 28: ...Chapter 4 Names of Parts 4 3 2 G7M DRT60U N 3 G7M DT60U N 4 G7M DT60U P...
Page 29: ...Chapter 4 Names of Parts 4 4 5 G7M DR60U DC 6 G7M DRT60U N DC 7 G7M DT60U N DC...
Page 31: ...Chapter 4 Names of Parts 4 6 3 G7M DT40U N 4 G7M DT40U P 5 G7M DR40U DC...
Page 32: ...Chapter 4 Names of Parts 4 7 6 G7M DRT40U N DC 7 G7M DT40U N DC 8 G7M DT40U P DC...
Page 33: ...Chapter 4 Names of Parts 4 8 4 1 3 30 point main unit 1 G7M DR30U 2 G7M DRT30U N 3 G7M DT30U N...
Page 34: ...Chapter 4 Names of Parts 4 9 4 G7M DT30U P 5 G7M DR30U DC 6 G7M DRT30U N DC...
Page 36: ...Chapter 4 Names of Parts 4 11 2 G7M DRT20U N 3 G7M DT20U N 4 G7M DT20U P...
Page 37: ...Chapter 4 Names of Parts 4 12 5 G7M DR20U DC 6 G7M DRT20U N DC 7 G7M DT20U N DC...
Page 38: ...Chapter 4 Names of Parts 4 13 8 G7M DT20U P DC...
Page 159: ...Chapter 7 Usage of Various Functions 7 52 c Program...
Page 183: ...Chapter 7 Usage of Various Functions 7 76 c Program...
Page 253: ...Chapter 8 Communication Functions 8 27 b When uses Ch 1 Built in RS 485...
Page 356: ...Appendix 1 System Definitions App1 9 6 Position Parameter...
Page 357: ...Appendix 1 System Definitions App1 10 7 High Speed Counter Parameter...