Endress+Hauser Topcal S CPC310, Руководство по эксплуатации

Страница: 83 / 176

Commissioning
83
Pulse frequency
Actuator Activation and subsequent entry
• Relay:
n.c., rel. x
• Max. frequency
060 ... 120 min
-1
Factory setting
Relay: n.c.
Max. frequency: 120 min
-1
Select the settings for the actuator.
Relay: Select the relay; you can choose from
the relays that you assigned to the controller in
"Set up 1 - Relays".
Max. pulse frequency: Enter the maximum
pulse frequency; pulses with a higher frequency
are not passed on to the relay.
Current output
Current range Options
• 0 ... 20mA
• 4 ... 20 mA
Factory setting
4 ... 20 mA
Select the current range to be output at the
current output.
Current value Options
• 20 mA
• 0/4 mA
Factory setting
0/4 mA
Assign the current value that corresponds to
100 % supply of dosing agent.
Type for "2-sided" process type
Control signal (only if continuous
controller was selected under
current output 2) Options
• 1 output
• 2 outputs
Factory setting
2 outputs
1 output: For the control signal via the current
output in the "Split range" method. Control
logics are required which can control two
valves/pumps over one current input.
2 outputs: The valves are controlled via the
relay.
1 output
Current range Options
• 0 ... 20mA
• 4 ... 20 mA
Factory setting
4 ... 20 mA
Select the current range to be output at current
output 2.
The neutral position (= current value which the
controller 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 value Options
• 20 mA
• 0/4 mA
Factory setting
0/4 mA
Assign the current value that corresponds to
100 % acid dosing.
!
Note!
From the current value selected for the dosing
of 100% acid, you can derive the current ranges
for acid/base dosing (see Fig. 58) in the "Split
range" method.
a0004343-en
Fig. 58: Two-side control via a current
output
Function Options Info
mA
4 8 12 16 20
50
100
0
Stroke
[%]
ac. bas.