TopCal S CPC 300
6 Commissioning
Hauser
69
6.5.14
Set up 2 – Limit switch
The Mycom S has several possibilities for assigning a relay contact. The limit contactor
can be assigned to a switch-on and switch-off point, as well as a pickup and dropout
delay. In addition, an error message can be generated when an alarm threshold is set.
You can trigger cleaning in connection with this error message (see Error/Contact
Assignment, page 48). These functions can be used both for pH/redox and temperature
measurement.
To illustrate the contact states of any relay or fault signalling contact, refer to fig. 32:
Switch-on point > switch-off point (with increasing measured values):
– the relay contact closes at after the switch-on point t
1
is exceeded and the pickup
delay (t
2
t
1
) expires.
– Then the alarm threshold t
3
is reached and the alarm delay (t
4
- t
3
) also expires, the
fault signalling contact switches.
– With returning measured values, the fault signalling contact reopens when the alarm
threshold is undershot at t
5
. The appropriate error message is deleted.
– The relay contact opens again after the switch-off point is reached at t
6
and the drop-
out delay has elapsed (t
7
- t
6
).
!
Note!
•
If the pickup and dropout delays are set to 0 s, the switch-on and switch-off points are
the switching points of the contacts.
•
You can make identical settings for
Switch-on point < switch-off point
similar to
Switch-
on point > switch-off point
function.
Содержание TopCal S CPC 300
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