225
V530-R160
Operation Manual
SE
C
T
IO
N
8
Serial Interf
ac
e (Norma
l)
SECTION 8
Communication with the Host
1:N (Multi Drop) Connection
@ GL
Function • • • The controller with the specified unit number performs one reading. Reading ends
when the reading is correctly performed (OK). When the reading is not correctly
performed (NG), reading continues to be performed for the number of retries speci-
fied in the setting conditions. Controllers with unit numbers other than the specified
unit number do nothing.
The data will not be output to the host (serial interface) by simply executing this com-
mand. To output the data, send a polling command (@RD).
Also, no response will be returned if the menu items are not registered.
@ RD
Function • • • The controller with the specified unit number outputs the latest reading data to the
host (serial interface). (Polling command)
Reading OK
Reading NG
If reading has not been performed since the menu items were registered
@
G
L
<Footer>
<Unit number>
Send
Receive
@
R
D
<Footer>
<Unit number>
Send
Receive
<Footer>
<FCS>
<Header> <Unit number> <Number of digits> <Reading data>
<Footer>
<FCS>
<Header> <Unit number>
?
<Error code>
<Footer>
ER
<Header> <Unit number>
* A setting can be made to add or not add the
boxes that are written with dashed lines .
