Chapter 8. Communication Functions
8-19
5) Registering variable for monitoring (X##)
(1) Introduction
Variables separately registered up to 10 (from 0 to 10) in combination with actual variable reading command, and carries
out the registered one through monitor command after registering.
(2) PC request fromat
Format
name
Header
Station
No.
Command
Register
no.
Registration format Tail
Frame
check
Frame (Ex.) ENQ H10 X(x) H09 See register format EOT BCC
ASCII value H05 H3130 H58(78) H3039 []※ H04
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 ENQ to EOT is converted into ASCII and added to BCC, and then
sent.
Register no.
Up to 10 can be registered (0 to 9, H00-H09). If a registered no. is registered again, only the one
currently being executed is registered.
Register
format
This is used to before EOT in command; individual reading of direct variable and continuous
reading format.
[]※ : Only one of following can be selected for register format.
① Individual reading of the direct device
RSS
Number of blocks (2 Byte) Device length (2 Byte) Device name (16 Byte)
...
1 block (max. 16 blocks)
② Continuous reading of the direct device
RSB
Device length (2 Byte)
Device name (16 Byte)
Number of data
(3) GM7U main unit response format (ACK response)
Format name Header Station No.
Command
Registration No. Tail Frame check
Frame (Ex.) ACK H10 X(x) H09 ETX BCC
ASCII value H06 H3130 H58(78) H3039 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.
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