Alstom GEM80-400 Series, Техническое руководство

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GEM80-400 2. Controller Architecture and Program Operation
Issue 3 04/99 ALSPA GEM80-400 SERIES CONTROLLERS TECHNICAL MANUAL Page 2-57
. .
- |
|GROUP2 SEQGRP SG002 |
+-<AND>---SPEC.----VALUE----------------------------<OUT>-+
| G20
T111 G1 G3 |
| +-< > |
| RESET2 | |
+--] [----------- + | }
| G21.0 | }
| }
| SE02/1 SE02/2 SE02/3 SE02/5 | GROUP
+[SQ]-|--[SQ]-|-+[SQ]-|-+[SQ]-|----------------------------- ( )---+ 2
| W112 W116
| W120 | W128 W132.1| }
| | | | }
| | SE02/4| | }
| +[SQ]-|-+ |
| W124 |
This example uses mnemonics SE01/1 to SE01/3 for STEPs 1 to 3 of SEQUENCE
number 01, and SE02/1 to SE02/5 for STEPs 1 to 5 of SEQUENCE number 02. The
value of GROUP1 (G10) will determine the states of the group variables :
GROUP HOLD (bit 0)
GROUP SIMULATE (bit 8)
GROUP INHIBIT (bit 9)
and RESET1 (G11.0) will determine the state of the GROUP RESET input.
These values will then be used within the GROUP1 sequence which comprises
STEPs 1, 2 and 3 of SEQUENCE number 01. The values of GROUP2 and RESET2 will
determine the states of the same GROUP inputs as before, to be used within the
GROUP 2 sequence comprising STEPs 1 to 5 of SEQUENCE number 02.
Example Program Showing Presetting of Values
The example which follows is the same as under sub-heading 4.6, extended to
show a typical method of copying preset data from the P-table to a working data
table. This sets up the mode of SEQELEM instructions and the Required Duration
for their built in timers. It should be noted that the copying occurs only on the first
power up of the controller, or if the controller store is cleared (for example if a
spare processor module has to be substituted). The copying does not occur on
halt to run transitions, or on power off/on, so the elements of a sequence are
capable of remembering the state of the plant through a shutdown period.