
Appendix
A-4
Relay
Name
Description
F090
20msec period clock
F091
100msec period clock
F092
200msec period clock
F093
1sec period clock
F094
2sec period clock
F095
10sec period clock
F096
20sec period clock
F097
1minute period clock
These relays repeat On/Off with fixed time interval,
and are generated in RUN mode only.
F100
~
F107
User defined clock
F100:clock0
~
F107:clock7
These relays repeat On/Off based on a scan time.
(Initial state=Off)
F110
Arithmetic error flag
Set when an arithmetic error occurred during operation
F111
Zero flag
Set when the result value is zero
F112
Carry flag
Set when Carry or Borrow occurs as a result of
operation
F11A
On sending flag
F11C
On receiving flag
F11E
Receive completion
Flag
These relays indicate the communication status
When DIN, DOUT instruction are used.
F11F
Communication
error flag
l
DIN, DOUT:Set when time-out error occurred
l
SEND, RECV:Set when time-out error occurs or
NAK massage is detected.
F120
<
F121
≤
F122
=
F123
>
F124
≥
F125
≠
These relays are set according to the result of
Compare instructions
(CMP, CMPP, DCMP, DCMPP)
F130
~
F135
I/O status
Each relays show whether relevant I/O modules
Are attached or not.
F140
~
F14F
HSC present value
HSCNT : The present value of high speed counter is stored.
HSC : The low wor d of present value of high speed counter is
stored.
F150
~
F15F
HSC preset value
HSCNT : The preset value of high speed counter is stored.
HSC : The high word of present value of high speed counter is
stored.
F094
1sec
1sec
2sec
n1 n2
DUTY
F10X
n1
n2