Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 61

Mycom S CPM 153
Endress+Hauser
CODE CHOICE
(default = bold)
MA3 +Relay
–Relay
Motor run time
Position feed-
back
MA4 Relay:
max. pulse fre-
quency
MA5 Relay:
Period:
t min:
E
MA6 0 ... 20 mA
4 ... 20 mA
MA7 0/4 mA
20 mA
Actuators:
With selection "two-sided" in field M1:
MB1 Dosing via:
2 outputs
1 output
INFO
n.c. Relay selection
n.c. (for three-point step controller)
+Relay: Open the valve further (= increase dosing)
off –Relay: Close the valve further (= reduce dosing)
(The first free relay is always offered as the default.)
Selection: n.c. (= not connected). After this, those
relays which are released in the Contacts menu are
always offered as the default.
Motor run time: The time the motor drive requires to
move the valve from completely closed to completely
open. The CPM 153 requires this to be able to calculate
the required pick-up time of the relay for any required
position change.
Position feedback: Without position feedback, the cur-
rent valve position is calculated using the entered
motor run time and the relay activity.
With switched-on position feedback, the CPM 153
expects feedback from the actuator drive about the
!
current valve position via a current or resistance input.
Note!
If you cannot select a relay here, use the "Contacts"
menu to make relays available for the controller
function.
n.c. Relay selection
1/min. (for pulse frequency)
Relay: Relay selection
max. pulse frequency: Input of the maximum pulse fre-
quency. (Pulses with a higher frequency are not forwar-
ded to the relay).
(Maximum setting: 120 1/min)
n.c. Relay selection
000.0 s (for pulse length)
Relay: Relay selection
000.0 s
Period: Period length T in seconds
(Range 0.5 ... 999.9 s)
min: Minimum switch-on period. (Shorter pulses are
t
E
not forwarded to the relay and treat therefore the
actuators with care).
Current output
Selection of the current range, which should be output
at the current output.
Current output
Assign the current value which corresponds to 100 %
dosing medium provision.
Control:
(This is only if you selected the constant controller
under current output 2.)
1 output: for control using the current output in the "split
range" method. Control logics are required which can
control two valves/pumps over one current input.
2 outputs: If the valves are controlled with two relays.
6 Start-up
61