YOKOGAWA F3LC11-1F, User Manual

Page: 180 / 202

C4-4
IM 34M6H41-01E 3rd Edition : Aug. 1, 2005-00
C4.1.1 Constituent Elements of Commands and Responses
[1] Command Format and its Elements
The format of a command transmitted from a higher level computer (or display) to the
FA-M3 is shown below.
1 1 2 2 3 2 1 1 Variable length
FC040101_1.EPS
Required only when “Yes” is
specified for the ending character
in the setting switch.
Required only when
“Y” is specified for the
checksum in the
setting switch.
No. of bytes
STX Elements
Station
number
(SA)
CPU
number
(nn)
Res-
ponse
wait
time
(WT)
Command Parameter
Checksum
(SUM)
ETX CR
(1) STX (Start of Text)
This precedes a block of text . The corresponding character code is CHR$(2).
(2) Station Number
Indicates which PC link module is to be accessed. For the F3LC11-2N module, set it
with the two rotary switches (see Figure C3.2).
Specify a station number from 1 to 32.
For the F3LC11-1N module, the station number is fixed to 01.
(3) CPU Number
Specifies the CPU module or one of the add-on CPU modules.
01: CPU module
02: Add-on CPU module 1
03: Add-on CPU module 2
04: Add-on CPU module 3
(4) Response Wait Time
You can specify the waiting time (time lag) between a transmitted command and its
response. Set a longer wait time if programming is done using a BASIC interpreter,
etc. on the higher level computer. Specify this time using one character (0 to F).