Example with unit address 200:
"
AID200;E._)(
,
I~B
,
5,X
"
"AID200;X"
8.9. SCAN FUNCTION
Execute on
"X"
mode, initiate block operation and execute
the first,
block-memory position.
Execution of second position
etc.
up
to
and including block
position
5.
(Available only
in
some slave units)
The scan function is used for the
sequential select of inputs, switches, channels. A
scan-cycle can be executed over channels of several units
on
the condition that:
All units are of the same PM-number.
All units are set for the same operating mode (see the System
21
manual and
the operating cards of the
slave units).
No unit is
in
Execute Unconditional mode (see
8.5)
.
The units have
successive-addres.~s
-
with settings starting at
0.
The scan is initiated by the command "AID nnn;l s
;;
,'
~h~te
'
rtnn
r
,
ep~e.sents
the
slave address. The execution is done with a number of execute commands or
triggers
equal
to
the number of channels
to
be scanned. Under the above
conditions a scan cycle will start with the lowest channel number of the unit with
address-switch set
to
zero and continue along all channels and units. A scan, once
initiated, may not
be
followed by other than execution commands. All other
commands
will cancel the scan.
Example:
"
AID200;E._)(
,
I~S
"
"AID201;E._)(,I~S"
"
AID202
;
E._)(,I~S
"
Repetitively:
"AID
;X
CU
20"
Initiate
a scan on PM2120 units with
addresses
200,
201
and 202.
Execute
to
all PM2120 units. The scan starts with
lowest channel of unit 200, and steps along all
channels
with the successive execute commands.
11
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