Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 62

6 Start-up
62
CODE CHOICE
(default = bold)
1 Output:
MBA1 0 ... 20 mA
4 ... 20 mA
MBA2 0 (or 4) mA
20 mA
2 outputs:
MBB1 Acid:
Alkali:
MBB2 +Relay
–Relay
Motor run time
Position feed-
back
MBB3 Relay:
max. pulse
frequency
MBB4 Relay:
Period:
t min:
E
MBB5 +Relay
–Relay
Motor run time
Position feed-
back
MBB6 Relay:
max. pulse fre-
quency
INFO
Current output
Selection of the current range, which should be
output at current output 2.
The neutral position (= current value which the control-
ler outputs when it is not dosing) is in the middle of the
selected range.
For 0 ... 20 mA, the neutral position is at 10 mA,
for 4 ... 20 mA at 12 mA.
Current output 2
Assign the current value, corresponding to 100 % of
!
the acid dosing.
Note!
From the current value selection for the dosing of
100 % acid, you can derive the current ranges for acid/
alkali dosing (see below, Fig. 23) in the "split range"
method.
Stroke
[%]
ac.
Fig. 23: Two-sided control over one current output
I length Dosing
I length Dosing can be carried be carried out using:
PWM (= pulse length proportional),
PFM (= pulse frequency proportional) or
1x Three-PS (= three-point step controller)
n.c. Acid dosing: Relay selection
n.c. (for three-point step controller)
Description see above
off
n.c. Acid dosing: Relay selection
1/min. (for pulse frequency)
Description see above
n.c. Acid dosing: Relay selection
000.0 s (for pulse length)
000.0 s Description see above
n.c. Alkali dosing: Relay selection
(for three-point step controller)
n.c.
Description see above
off
n.c. Alkali dosing: Relay selection
1/min. (for pulse frequency)
Description see above
Mycom S CPM 153
alk.
Endress+Hauser