Eurotherm 590+ Series, Руководство по эксплуатации продукта, Страница: 140 / 308

6-30
Programming Your Application
590+ Series DC Digital Converter
Additional Inputs
It is possible to use an Analog Input as
a Digital Input to extend the number of
Digital Inputs available. Again, 0.00%
is regarded as Logic 0 and any other
value is regarded as Logic 1.
DIGITAL INPUT C4 and DIGITAL INPUT C5
Digital Inputs C4 and C5 have DESTINATION TAGs only. They do not support VALUE TRUE
and VALUE FALSE, (VALUE TRUE is fixed at 0.01%, and VALUE FALSE is fixed at
0.00%).
DIGITAL INPUT C4
Refer to the DIAGNOSTICS function block description, page 6-22.
Only the OUTPUT (DESTINATION TAG) parameter of this digital input can be configured. By
default it is set to 496, which is the Tag No. for JOG/SLACK in the AUX I/O function block.
DESTINATION TAG
Destination of DIGITAL INPUT C4
Range:
0 to 549
Default: 496
TAG N°: 494
DIGITAL INPUT C5
Refer to the DIAGNOSTICS function block description, page 6-22.
Only the OUTPUT (DESTINATION TAG) parameter of this digital input can be configured. By
default it is set to 497, which is the Tag No. for ENABLE in the AUX I/O function block.
DESTINATION TAG
Destination of DIGITAL INPUT C5
Range:
0 to 549
Default: 497
TAG N°: 495
If terminal C5 is used for anything other than “drive enable”, i.e. DESTINATION TAG
(Tag No. 495) is
not set to 497, then the ENABLE parameter, Tag No. 497, must be set to
ON, otherwise the drive will not run.
Using Analog I/P as Digital I/P
Digital Dest.n TAG
0%
100%
0
100%
DIAGNOSTIC