Appendix C – Table of MFC710 frequency converter's parameters
Parameter / Name
Function
Available options / measurement unit
Factory
setting
Change
during
operation
5.18 P3 active
Pump 3 activation
000 Sw.Off
– pump disabled
001 In.C1 … 006 In.C6
– pump enabled by one of
digital inputs DI1 … DI6
007 Sw.On
– pump enabled
003 In.C3
YES
5.19 P4 active
Pump 4 activation
000 Sw.Off
– pump disabled
001 In.C1 … 006 In.C6
– pump enabled by one of
digital inputs DI1 … DI6
007 Sw.On
– pump enabled
004 In.C4
YES
5.20 P5 active
Pump 5 activation
000 Sw.Off
– pump disabled
001 In.C1 … 006 In.C6
– pump enabled by one of
digital inputs DI1 … DI6
007 Sw.On
– pump enabled
005 In.C5
YES
5.21 Rep. time
Time of automatic
replacement of leading
pump
1 ... 32000 h
24 h
YES
5.22 ON delay
Delay of switching on
A time limit before switching on the additional pump
0.0 … 60.0 sec
10.0 s
YES
5.23 OFF delay
Delay of switching off
A time limit before switching of the additional pump
0.0 … 60.0 sec
10.0 s
YES
5.24 Rep. Block.
Postponing automatic
change of leading pump at
high load
PCH.000 ... PCH.511
.
When referencing-unit of Pump Controller stays
above this value, then automatic change will be
postponed till decrease of the pressure.
100.0 %
(PCH 147)
YES
5.25 f thresh.
F threshold
Frequency of enabling additional pump: 0.0...50.0 Hz 25.0 Hz
YES
5.26 Insensiv.
Insensibility
Insensibility of enabling / disabling additional pump:
0.0...20.0 %
5.0 %
YES
5.27 Ref. choice
Selection of referencing-
unit for pumps control
Source of pressure signal:
144 Ref.A0 ... 146 Ref.A2
– from analog referencing-
units (direct control of pumps group)
158 RefPID
– from PID controller output (most
common setting)
Note: parameters
147 100% … 157 PIDerr
are
service parameters and should not be used!
144 Ref.A0
YES
5.28 P limit
Max number of
simultaneously operating
pumps
1 ... 5
4
YES
5.29 P6 active
Pump 6 activation
000 Sw.Off
– pump disabled
001 In.C1 … 006 In.C6
– pump enabled by one of
digital inputs DI1 … DI6
007 Sw.On
– pump enabled
000 Sw.Off
YES
5.30 Block time
Minimum break time
operation of the pump
0 … 32000
0 s
YES
5.40 Sw. Seq ON
Enable Sequencer
Signal of enabling PLC sequencer block:
PCH.000 Sw.Off ... PCH.511
PCH.000 = SEQ disabled
000 Sw.Off
YES
5.41 nu
Service parameter
5.42 Seq max
Number of sequencer
states
2 ... 8
8
YES
5.43 Seq time 1
Time of 1st state duration
PCH.000 Sw.Off ... PCH.511
PCH.320
Constant.1
YES
5.44 Seq time 2
Time of 2nd state duration
PCH.000 Sw.Off ... PCH.511
PCH.321
Constant. 2
YES
5.45 Seq time 3
Time of 3rd state duration
PCH.000 Sw.Off ... PCH.511
PCH.322
Constant.3
YES
5.46 Seq time 4
Time of 4th state duration
PCH.000 Sw.Off ... PCH.511
PCH.323
Constant.4
YES
5.47 Seq time 5
Time of 5th state duration
PCH.000 Sw.Off ... PCH.511
PCH.324
Constant.5
YES
5.48 Seq time 6
Time of 6th state duration
PCH.000 Sw.Off ... PCH.511
PCH.325
Constant.6
YES
5.49 Seq time 7
Time of 7th state duration
PCH.000 Sw.Off ... PCH.511
PCH.326
Constant.7
YES
5.50 Seq time 8
Time of 8th state duration
PCH.000 Sw.Off ... PCH.511
PCH.327
Constant.8
YES
Frequency converter MFC710 type with OP-11 control panel. TWERD Power Electronics
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