KEYENCE LS-3100/3100W Series - Manual (Page 80)

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Status Byte When the LS controller receives serial polling signal from the controller, the
LS controller transmits a status byte.
The content of the status byte is as shown below.
CHAPTER 6 Optional Interface Boards
Basic Sequence
When Selecting and Setting
Function When 2 or more commands are transmitted, loop 1 is executed repeatedly.
When Reading Output Data
DI01 DI02 DI03 DI04 DI05 DI06 DI07 DI08
0 0 0 0 0 0
RQS bit Bit DI01 is set to "1"
when syntax error
occures
(MSB) (LSB)
Controller
(computer, etc.)
LS
Transmitting command
Analyzing command
Checking command
for error
No.
Yes.
Setting data to be
transmitted
Clearing device
Polling
Setting RQS bit to "1"to
indicate that error occurs 1
Controller
(computer, etc.)
LS
Transmitting command
Analyzing command
Checking command
for error
No.
Yes.
Setting data to be
transmitted
Clearing device
Polling
Setting RQS bit to "1"to
indicate that error occurs
1
Reading data
2
Data cannot be read into the LS controller in the talk only mode.
When 2 or more commands are transmitted, loop 1 is executed repeatedly.
When the command to continuously output measured values (such as "X1")
is transmitted, operation 2 is executed repeatedly.
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