Plc Control; Digital Inputs; Start Input; Prog Input - Sartorius Sartocheck 4 plus Operating Instructions Manual

14. PLC Control

14.1 Digital Inputs

14.1.1 START Input

14.1.2 PROG Input

14.1.3 STOP Input

14.2 Digital Output

14.2.1 POWER on

14.2.2 TEST RUNNING

14.2.3 ERROR

14.2.4 TEST OK

14.2.5 TEST not OK

14.2.6 External Valve 1

14.2.7 External Valve 2

14. PLC Control
There are three digital inputs available (START, PROG and STOP). An impulse at one of
these inputs has to be at least 450 msec long for it to be correctly identified.
450 ms
An impulse at the START input will start the test program stored in PLC1 or PLC2,
depending on the PROG input below (see section 7.13.1 for loading test programs
into memory locations PLC1 and PLC2).
If a test unit is currently active, then an impulse at the START input will have
no effect.
In order to start PLC2, the PROG input needs to be set to high before the START
impulse is initialized. After the test has been completed, the PROG input has to be set
to low again.
An impulse at the STOP input has the same effect as pressing the STOP key
®
on the Sartocheck 4 plus Bag tester unit and therefore will stop already started
®
programs on Sartocheck 4 plus Bag tester.
There are seven digital outlets with the following description and function:
This outlet is always high when the PLC-function is activated in the unit.
The outlet is set to high when a START impulse is initiated from the PLC and the
additional conditions described above are fulfilled.
The ERROR outlet is set to high with every error which can occur during the test run.
Additionally, it is high when the temperature control is addressed or the operating
pressure in the functional control is too low.
The outlet is high after the test is finished and has passed.
The outlet is high after the test is finished and has failed.
The outlet is high if a START impulse is sent by the PLC, and is set back at the end
of the measurement phase.
The outlet is high if a START impulse is sent by the PLC, and is set back at the end
of the measurement phase.
All outlets are chargeable with 0.3 A. All outlets except the "POWER ON" display
are reset at high with a STOP impulse. After this STOP impulse, the unit is again ready
for the next test.
PLC Control 77