Page 1
INSTRUCTION MANUAL
Duty-Standby Pumps
Alternation
Page 2
Page 3
Table of Contents
Operation.........................................................................................................................................2
Duty-standby pumps alternation...............................................................................................2
Drive connections diagram........................................................................................................3
Parameter values......................................................................................................................... 4
Table of Contents
Duty-Standby Pumps Alternation INSTRUCTION MANUAL 1
Page 4
Operation
Operation
Duty-standby pumps alternation
Drives can be set up to operate two pumps running alternatively to provide a reliable
pumping system. This helps to extend the life of pumps, energy conservation, and reduce
maintenance costs.
1. The Master drive and Slave drive use Setup 3 and Setup 4 to operate the alternation
operation.
2. To enable the alternation, set the parameter 13–00 SL Controller Mode in the Master
drive to On or vice versa.
3. The Master drive will control the alternation operation:
a) Timed alternation: Alternation timing is determined by Timer 0 in the parameter
13–20.0 SL Controller Timer in the Master drive. Changing this timer changes the
alternation timing.
b) Manual alternation: Pressing the [OK] and [>] keys on the Master drive at the same
time resets the alternation timer and alternate the drives for running the pump.
c) If the Off key of the Master drive is pressed, both drives stop the pumps.
d) If the Off key of the Slave drive is pressed, the Master drive continuously runs the
pump.
e) If any drive loses power or is stopped due to an alarm condition, the lag pump
automatically starts and continuously operates.
f) If the Hand on key in each drive is pressed, the drives run their own pumps
independently.
4. Refer to the wiring diagram for the wiring connection between the Master and Slave
drives.
5. The alternation process is performed as follows:
a) At start-up and in normal condition, the State Controller of the Master drive starts
in Setup 3 and runs its pump while the Slave drive starts in Setup 4 and stops its
pump due to input high received from the Master drive.
b) When the Timer 0 expires, the Master drive changes to Setup 4 and stops its
pump. At this time the input to the slave is low, the Slave drive changes to Setup 3,
and runs its own pump.
c) When the [OK] and [>] keys on the Master drive are pressed at the same time, the
Timer 0 is reset and alternates the drives.
d) When the Master or Slave drive is powered off or gets in an alarm condition, it
sends a low output signal to the other drive for changing the drive’s setup to
Setup 3 to run its own pump.
e) When the Master drive is in the Off mode, the Master drive stops and sends a high
output signal to the Slave drive to stop the slave pump.
f) When the slave is in the Off mode, it sends a low output signal to the Master drive
for running the Master pump.
2 Duty-Standby Pumps Alternation INSTRUCTION MANUAL
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Drive connections diagram
18
19
32
32
29
18
+24V DC
Input: Select bit 1 / Select bit 1
Output: No alarm / Hand/Off
+24VC
Input: Start / No operation
MASTER Drive
SLAVE Drive
Input: Select bit 0 / Select bit 0
Common
19
12 12
29
20 20
Input: Start / No operation
Common
Output: Logic rule 0 / Logic rule 0
Input: Select bit 0 / Select bit 0
COM
01
02
03
04
05
06
Relay 1:
Factory preset
Alarm / Alarm
Relay 2:
Factory preset
Running / Running
COM
COM
COM
04
05
06
01
02
Relay 1:
Factory preset
Alarm / Alarm
Relay 2:
Factory preset
Running / Running
Input: Select bit 1 / Select bit 1
03
Operation
Master Terminal
Master Terminal Slave Terminal
MT12 — MT18
MT12 — MT19
Slave Terminal ST29 — MT32
NOTES:
1. Remote Start/Stop switch can be added to the drives by removing the jumper wire
from pin 12 to pin 18 from both drives and connect remote start/stop to pin 12 and
pin 18 to both drives with parallel connection.
2. The DI terminal 19 provides the most significant bit value (always high) and the DI
terminal 32 provides the least significant bit value for selecting Setup 3 or Setup 4.
MT20 — ST20
MT29 — ST32
ST12 — ST18
ST12 — ST19
Duty-Standby Pumps Alternation INSTRUCTION MANUAL 3
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Operation
Parameter values
Table 1: MASTER Duty-Standby Parameters
Parameters number Description Set to Setup 3 Set to Setup 4 Comments
Operation / Display
0–01 Language [0] English [0] English English language is
detected
0–03 Regional settings [1] North America [1] North America Sets 1–20 Motor Power
[HP] to HP and the default
value of 1–23 Motor
Frequency to 60 Hz
0–10 Active Set-up [9] Multi Set-up [9] Multi Set-up Uses the setting from
0–12 This Set-up Linked to.
0–11 Programing Set-up [9] Active Set-up [9] Active Set-up The set-up in which the
frequency converter is
operating.
0–12 The Set-up Linked to [0] Not linked [3] Set-up 3 Enable conflict-free
changes between Set-up 3
and Set-up 4.
Note: Also set Setup 1 and
Setup 2 to Set-up 3.
0–37 Display Text 1 Lead Pump Lead Pump This message indicates the
running pump.
0–38 Display Text 2 Lag Pump Lag Pump This message indicates the
pump that is waiting for
alternation.
Digital In/Out
5–01 Terminal 27 Mode [0] Input [0] Input This digital input is not
used.
5–02 Terminal 29 Mode [1] Output [1] Output This digital input provides
output to the Slave drive.
5–10 Terminal 18 Digital Input [8] Start [0] No Operation The Master drive can only
start in Set-up 3.
5–11 Terminal 19 Digital Input [24] Set-up select bit 1 [24] Set-up select bit 1 This digital input is tied to
+24 V DC as input high for
the most significant bit of
Set-up 3 and Set-up 4.
Notes: Also set Setup 1 and
Setup 2 to this value (Set-
up select bit 1).
5–12 Terminal 27 Digital Input [0] No Operation [0] No Operation This digital input is not
used.
5–14 Terminal 32 Digital Input [23] Set-up select bit 0 [23] Set-up select bit 0 This digital input provides
the least significant bit
value in selecting Set-up 3
or Set-up 4.
Notes: Also set Setup 1 and
Setup 2 to this value (Set-
up select bit 0)
4 Duty-Standby Pumps Alternation INSTRUCTION MANUAL
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Operation
Parameters number Description Set to Setup 3 Set to Setup 4 Comments
5–31 Terminal 29
Digital Output
[160] No alarm [168] Hand / Off Output is high when there
is no alarm, in Off and
Hand on mode, and Timer
0 expires or [OK] and [>]
keys are pressed in Setup
4.
Output is low when alarm
has occurred, and Timer 0
expires or [OK] and [>]
keys are pressed in Setup
3.
Relays
5–40.0 Function Relay [9] Alarm [9] Alarm Default setting
5–40.1 Function Relay [5] Running [5] Running Default setting
Smart Logic
13–00 SL Control Mode [1] On [1] On Enables the Smart Logic
Controller
13–01 Start Event [1] True [1] True Enters the fixed value of
TRUE in the logic rule.
13–02 Stop Event [0] False [0] False Enters the fixed value of
FALSE in the logic rule.
Timers
13–20.0 SL Controller Timer 24:00:00.000 24:00:00.000 Timing between
alternations set by Timer 0.
13–20.1 SL Controller Timer 00:00:02.000 00:00:02.000 Timing for pressing [OK]
and [>] keys set by Timer
1.
Logic Rules 0
13–40.0 Logic Rule
Boolean 1
13–41.0 Logic Rule
[43] OK Key [43] OK Key Drives can be alternated by
pressing [OK] and [>] keys
[1] AND [1] AND
at the same time ot the
Timer 0 expires.
Operator 1
13–42.0 Logic Rule
[46] Right Key [46] Right Key
Boolean 2
13–43.0 Logic Rule
[2] OR [2] OR
Operator 2
13–44.0 Logic Rule
[30] SL Time-out 0 [30] SL Time-out 0
Boolean 3
Logic Rules 1
13–40.1 Logic Rule
Boolean 1
13–41.1 Logic Rule
Operator 1
13–42.1 Logic Rule
[37] Digital Input DI32 [37] Digital Input DI32 Output is high when the
output from Slave drive is
[6] NOT OR [6] NOT OR
low or [OK] and [>] keys
are pressed or Timer 0
expires.
[26] Logic rule 0 [26] Logic rule 0
Boolean 2
13–43.1 Logic Rule
[0] DISABLE [0] DISABLE
Operator 2
13–44.1 Logic Rule
[0] False [0] False
Boolean 3
Duty-Standby Pumps Alternation INSTRUCTION MANUAL 5
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Operation
Parameters number Description Set to Setup 3 Set to Setup 4 Comments
Logic Rules 2
13–40.2 Logic Rule
Boolean 1
13–41.2 Logic Rule
[37] Digital Input DI32 [37] Digital input DI32 Output is high when input
from Slave drive is high
[1] AND [1] AND
and [OK] and [>] keys are
pressed or Time 0 expires.
Operator 1
13–42.2 Logic Rule
[26] Logic rule 0 [26] Logic rule 0
Boolean 2
13–43.2 Logic Rule
[0] DISABLE [0] DISABLE
Operator 2
13–44.2 Logic Rule
[0] False [0] False
Boolean 3
State 1
13–51.0 SL Controller Event [1] True [1] True Start at Setup 3
13–52.0 SL Controller Action [4] Select set-up 3 [4] Select set-up 3
State 2
13–51.1 SL Controller Event [1] True [1] True If [OK] and [>] keys are
13–52.1 SL Controller Action [30] Start time 1 [30] Start timer 1
pressed, switch
debouncing timer prevents
unexpected results
occurred.
State 3
13–51.2 SL Controller Event [31] SL Time-out 1 [31] SL Time-out 1 After the switch
13–52.2 SL Controller Action [29] Start timer 0 [29] Start timer 0
debouncing timer expires,
the alternation timer 0 is
reset.
State 4
13.51.3 SL Controller Event [28] Logic rule 2 [28] Logic rule 2 If digital input from Slave is
13.52.3 SL Controller Action [5] Select set-up 4 [4] Select set-up 4
high and output from logic
rule 0 is high, select Setup
4.
State 5
13–51.4 SL Controller Event [1] True [1] True If [OK] and [>] keys are
13–52.4 SL Controller Action [30] Start timer 1 [30] Start timer 1
pressed, switch
debouncing timer prevents
unexpected results
occurred.
State 6
13–51.5 SL Controller Event [31] SL Time-out 1 [31] SL Time-out 1 After the switch
13–52.5 SL Controller Action [29] Start timer 0 [29] Start timer 0
debouncing timer expires,
the alternation timer 0
starts.
State 7
13–51.6 SL Controller Event [27] Logic rule 1 [27] Logic rule 1 If logic Rule 1 is high, no
13–52.6 SL Controller Action [1] No Action [1] No Action
action.
Table 2: SLAVE Duty-Standby Parameters
Parameters Number Description Set to Setup 3 Set to Setup 4 Comments
Operation / Display
6 Duty-Standby Pumps Alternation INSTRUCTION MANUAL
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Operation
Parameters Number Description Set to Setup 3 Set to Setup 4 Comments
0–01 Language [0] English [0] English English language is
selected.
0–03 Regional Settings [1] North America [1] North America Sets 1–20 Motor Power
[HP] to HP and the default
value of 1–23 Motor
Frequency to 60 Hz.
0–10 Active set-up [9] Multi Set-up [9] Multi Set-up Uses the setting from 0–12
This Set-up Linked to.
0–11 Programming Set-up [9] Active Set-up [9] Active Set-up
0–12 This Set-up Linked to [0] Not linked [3] Set-up 3 Enable conflict-free
changes between Set-up 3
and Set-up 4.
Note: Also set Setup 1 and
Setup 2 to Set-up 3.
0–37 Display Text 1 Lead Pump Lead Pump This message indicates the
running pump.
0–38 Display Text 2 Lag Pump Lag Pump This message indicates the
pump is waiting for
alternation.
Digital In/Out
5–01 Terminal 27 Mode [0] Input [0] Input This digital input is not
used.
5–02 Terminal 29 Mode [1] Output [1] Output This digital input provides
output to the Slave drive.
5–10 Terminal 18
Digital Input
5–11 Terminal 19
Digital Input
[8] Start [0] No operation The slave drive can only
start in Set-up 3.
[24] Set-up select
Bit 1
[24] Set-up select
Bit 1
This digital input is tied to
+24 V DC as input high for
the most significant bit of
Set-up 3 and Set-up 4.
Note: Also set Setup 1 and
Setup 2 to this value (Set-
up select bit 1)
5–12 Terminal 27
[0] No Operation [0] No Operation Terminal 27 is not used.
Digital Input
5–14 Terminal 32
Digital Input
[23] Set-up select
bit 0
[23] Set-up select
bit 0
NOTE: Also Setup 1 and
Setup 2 to this value (Set-
up select bit 0)
5–31 Terminal 29
Digital Output
[70] Logic rule 0 [70] Logic rule 0 Output is low when alarm
has occurred or in Off or
Han on mode
Relays
5–40.0 Function Relay [9] Alarm [9] Alarms Default setting
5–40.1 Function Relay [5] Running [5] Running Default setting
Smart Logic
13–00 SL Control Mode [0] Off [0] Off Disables the Smart Logic
Controller
Comparator 0
13–10.0 Comparator Operand [180] Local reference active [180] Local reference active Uses for comparing with
13–11.0 Comparator Operand [5] TRUE longer than... [5] TRUE longer than...
the Off mode.
Logic Rules 0
Duty-Standby Pumps Alternation INSTRUCTION MANUAL 7
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Operation
Parameters Number Description Set to Setup 3 Set to Setup 4 Comments
13–40.0 Logic Rule
Boolean 1
13–41.0 Logic Rule
[22] Comparator 0 [22] Comparator 0 Output is high if the Slave
drive is not in Off and not
[7] NOT AND NOT [7] NOT AND NOT
in alarm condition.
Operator 1
13–42.0 Logic Rule
[20] Alarm (trip) [20] Alarm (trip)
Boolean 2
13–43.0 Logic Rule
[3] AND NOT [3] AND NOT
Operator 2
13–44.0 Logic Rule
[21] Alarm (trip lock) [21] Alarm (trip lock)
Boolean 3
NOTE:
1. “Lead Pump” and “Lag Pump” messages can be displayed on the LCP by displaying
“Display Text 1” in Setup 3 and displaying “Display Text 2” in Setup 4 at line 2 or line 3.
8 Duty-Standby Pumps Alternation INSTRUCTION MANUAL
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Page 12
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