CONTREX CX-1200 - Manual (Page 204)

5 - 111
DIGITAL I/O
The PLC / Digital I/O, (page 1) screen displays parameters that are associated with the digital inputs for the
PLC (DI-8 through DI-15). The DI-14 and DI-15 are routed to the Scroll Up bit (168) and Scroll Dn bit
(169) respectively by the default PLC program. This allows these digital inputs to control the remote scroll-
up and remote scroll-down function. The remote-scroll function can be assigned to almost any of the Control
Parameters. Use Remote Scroll (CP-400) to select the Control Parameter that you want to assign to the
remote scroll function. The rate of change when the PLC Bit is “1” (On or Digital Input active with default
PLC program) is determined by Rmt Scroll Rate (CP-401). This is the number of increments/decrements to
the least significant digit every second that the PLC bit (input) is active. Use Table 5-1 for the time-between
increments or decrements of the various remote scroll rates.
DI 1 Shot (CP-402) determines which digital inputs will cause the corresponding PLC bit (8-15) to be “1”
(On) for one PLC scan (one-shot) when an open-to-closed (active) transition occurs on the input. This is the
default one-shot for the PLC.
Remote Scroll Rate
Increment Interval
(Time)
Number of 10 - mSec
1
Samples per Interval
10
5
4
3
2
15
14
12
11
50
30
25
20
100
1000 mSec = 1 Sec
500 mSec
100 mSec
200 mSec
250 mSec
333 mSec --> 330 mSec
67 mSec --> 60 mSec
50 mSec
40 mSec
33 mSec --> 30 mSec
20 mSec
10 mSec
71 mSec --> 70 mSec
83 mSec --> 80 mSec
91 mSec --> 90 mSec
100
10
20
25
33
50
6
7
8
9
2
3
4
5
1
Table 5-1 Remote Scroll Rates