Chapter 8. Communication Functions
8-22
(4)
GM7U main unit response format (NAK response)
Format name
Header
Station
No.
Command
Registration No.
Error code
(Hex 2Byte)
Tail
Frame check
Frame NAK
H10 Y(y)
H09 H1132
ETX
BCC
ASCII value
H15
H3130
H59(79)
H3039
H31313332
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 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 registered device no. 1 at station no. 1 is read, and the BCC value is checked. It is also
assumed that the device %MW0 is registered and the number of blocks is 1.
①
PC request format (PC
→
GM7U main unit)
Format name
Header
Station
No.
Command
Registration No.
Tail
Frame check
Frame (Ex.)
ENQ H01
Y
H01
EOT
BCC
ASCII value
H05 H3031
H79
H3031
H04
②
For ACK response after execution of command (PC
→
GM7U main unit)
Format name Header
Station
No.
Command
Registration
No.
Number of
Blocks
Number of
data
Data
Tail
Frame check
Frame
ACK
H01 y H01 H01 H04 H23422339 ETX BCC
ASCII
value
H06 H3031 H79
H3031 H3031 H3034 H3233343232333339 H03
③
For NAK response after execution of command (PC
→
GM7U main unit)
Format name
Header
Station
No.
Command
Registration No.
Error code
Tail
Frame check
Frame (Ex.)
NAK H01
y
H01
Error code (2)
ETX
BCC
ASCII value
H15 H3031
H79
H3031
Error code(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...