BENSHAW RSi H2P Series Instruction Manual Download Page 26 | Manualshive

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890053-02-00

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9

Lead/Lag - Follow Lead

Control Mode for multiple drives where the Main drive is PI controlled all running Lag (Aux) drives/motors operate
at the same PID output frequency as the Main drive. During staging/de-staging, a shift of the Main PI controlled
drive occurs. With actual feedback wired to Drive 1 only, Drives 2 and 3 receive the feedback signal through Modbus
communications. Note that the Lead (+) drive (controlling communications) does not change, only the Main PI
controlled drive changes.

The following figure shows the basic operating sequence for Follow Lead operation for Drives 1, 2 and 3. In this
case the alternating sequence AP1-49 (ALT Sequence) is set to FILO (First In Last Out) and the run priority AP1-
45 (Curr. Prty 1) is 0321. Run priority means that Drive 1 is the first priority and Drives 2 and 3 are 2

nd

and 3rd

priority. With FILO, the motor starting order is Motor 1 (M1) -> Motor 2 (M2) -> Motor 3 (M3). Motor stopping order
is Motor 3 (M3) -> Motor 2 (M2) -> Motor 1 (M1).

9.1

Follow Lead - Conditions for Staging Lag Drives

1.

Feedback is below the setpoint PID-11 (PID Ref 2 Set) and below the deviation amount AP1-50 (Stage
Pres. Dv).

2.

Output Frequency of the Main Drive reached stage frequency AP1-61 (Stage Freq 1).

3.

The stage delay time AP1-53 (Stage DT) has expired.

Follow Lead - FIFO

9.2

Follow Lead - Staging Details

With the start of Drive 1 which is the Lead (+) and the Main drive, the speed ramps up. If the three staging conditions
are met, (feedback below setpoint, operating frequency reaches staging frequency and the delay time has expired),
Drive 2 (M2) starts

and now becomes the Main PI controlled drive. Drive 1 (M1) becomes the Lag (Aux) drive

and follows the output of Drive 2. There is a shift in the Main PI controlled drive from Drive 1 to Drive 2.

If

feedback still remains below the setpoint, Lag Drive 3 (M3) will start

and now

Drive 3 becomes the Main PI

controlled drive.

There is a shift in the Main PI controlled drive from Drive 2 to Drive 3. Drive 2 becomes

another Lag (Aux) drive,

the 2

nd

Lag drive in operation. Lag Drives 1 and 2 will still follow the Main PI controlled

Drive output, which is now Drive 3 (M3).

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Summary of Contents for RSi H2P Series

Page 1: ... 1 0 to 25 HP 230V 1 0 to 800 HP 460V Instruction Manual 890053 02 00 2020 Benshaw Inc Benshaw retains the right to change specifications and illustrations in text without prior notification The contents of this document may not be copied without the explicit permission of Benshaw ...

Page 2: ......

Page 3: ...d Parameters 10 7 Application Group 1 AP1 Parameter List 11 8 Application Group 1 AP1 Parameter Descriptions 14 9 Lead Lag Follow Lead 22 9 1 Follow Lead Conditions for Staging Lag Drives 22 9 2 Follow Lead Staging Details 22 9 3 Follow Lead Conditions for De staging Lag Drives 23 9 4 Follow Lead De staging Details 23 10 Lead Lag Fixed Lag 24 10 1 Fixed Lag Conditions for Staging Lag Drives 24 10 ...

Page 4: ...ge 33 17 Standby 34 18 Sleep Wake Up 36 18 1 Sleep Mode 36 18 2 Sleep Boost 36 18 3 Wake Up 36 19 Lost Feedback and High Feedback Settings 38 19 1 Lost Feedback 38 19 2 High Feedback 38 20 Data Share 39 21 Troubleshooting Communication Problems in Lead Lag Operation 40 22 Revision History 2 ...

Page 5: ... logic to control ATL contactors or starters referred to as AUX motors A single drive can control up to five 5 AUX motors 8 with Ext IO Card via output relays from the Main drive The relays are programmed to add remove additional AUX motors as needed This is for a single drive only not multiple drives Contactor Lag MMC operation is covered in a supplemental manual that describes this method in mor...

Page 6: ...trol of the system The PI Control shifts to each Lag or Aux drive making it the Main PI controlled drive The Lead drive now becomes a Lag or Aux drive but retains the for communications Lag or Aux drives are controlled based on Lead drive operation Follow Lead or Fixed Lag and the PI function of the Main drive A Lead Lag system with only one transducer connected to one drive can only have one Lead...

Page 7: ...dication includes STP Stopped not in Run Mode SLP Sleep Mode WAN Warning of certain setting limits TRP Tripped See parameter AP1 47 for additional status indication 3 2 Monitor Screen The Monitor Screen is set up to display the Reference Setpoint and Feedback in PID units Any of the displayed lines can be changed and set to the user s preference with the parameters listed below CNF 21 Monitor Line...

Page 8: ...OG Acc Time and DRV 13 JOG Dec Time Note When powered is cycled the drive will reboot to the same status it was in before power was removed EX If Stopped via OFF button will reboot to off mode If in AUTO mode Forward run mode before power was removed it will reboot to AUTO Forward run mode AUTO LED green not blinking 3 4 Start Stop Control The Lead Lag software default settings for start stop are ...

Page 9: ...drive if the Lead drive is manually stopped trips or malfunctions A Lag drive must receive a feedback signal 4 20mA Loop or separate to become a Lead drive for continuous control of the system Depending on transducer wiring see Note in Section 6 Macro 2 Group MC2 for parameter MC2 03 setting for Lag drives Utilize the standard H2 Drive Manual for wiring not related to the Lead Lag operation any ad...

Page 10: ...default for COM 01 Drive ID is 0 If COM 01 is not set in each drive the drive will flash a warning Int485 St ID as a reminder to set COM 01 when changing other parameters The firmware places the Lead Lag parameters in a Macro group MC2 To access the Macro group Step 6 At the first drive with COM 01 set as Drive ID 1 press the MODE button while viewing the upper left corner of the LCD Stop when U M...

Page 11: ...No View accumulated time before alternation occurs MC2 07 AP1 42 of Pumps 0 8 5 Yes of pumps drives connected in Lead Lag system See Standby MC2 08 AP1 94 Of Drives 0 8 5 Yes of drives running in Lead Lag system MC2 09 DRV 03 Acc Time 0 0 600 0 20 sec Yes Acceleration and Deceleration times based on 60 Hz MC2 10 DRV 04 Dec Time 0 0 600 0 20 sec Yes MC2 11 AP1 50 Stage Pres Dv 0 00 300 00 5 PSI Yes...

Page 12: ...PmpRunTime Min 0 00 23 59 0 00 Hr min No Run Time Hrs mins MC2 31 AP1 98 PmpRunTime Clr 0 None 0 None No For the Pump selected in MC2 28 AP1 95 clear the Days Hrs Mins in MC2 29 30 AP1 96 97 1 All 2 Pump1 through 9 Pump 8 MC2 32 PID 11 PID Ref 1 Set 0 PID 53 60 PSI Yes Setpoint entered here when PID 10 Setpoint Source is set to Keypad The default setting is 20 in PID Units of the MC2 37 PID 53 max...

Page 13: ...ble set AP2 54 to 0 00 PID Units MC2 44 AP2 55 Lost Fdb Mode 0 None Free Run No None Disable Lost Feedback monitoring 1 Warning Warning Provide alert of Lost or Low Feedback 2 Free run Free Run or Decel Enables trip on Lost Feedback fault along with stop method 3 Dec AP2 56 Lost Fdb Time 0 1 120 0 secs 20 0 No Time Delay for Lost Feedback Warning or Fault AP2 57 Lost Fdb Level 100 100 of PID 53 1 ...

Page 14: ...ed to IN 87 Yes Drive will start on Power Up with active start run command No Drive requires start run command after Power Up 1 Yes ADV 11 Power On Delay 0 0 6000 0 0 0 secs No PRT 08 RST Restart Bit 00 11 11 bit No Automatic Fault Resets This is a 2 bit representation 00 Off Off Disable Auto Fault Resets 11 On On Enable Auto Fault Resets Bit 0 Faults other than LV trip Bit 1 LV Trip PRT 09 Retry ...

Page 15: ...1 31 Max Comp amount Max Comp Value 0 00 Unit Band 0 00 Yes AP1 401 MMC Lead Lag Function Selection Lead Lag Sel 0 None 0 None No 1 Contactor Lag 2 Follow Lead 3 Fixed lag 4 Network Fbk AP1 412 Bypass selection Regul Bypass 0 No 0 No No 1 Yes AP1 42 Number of auxiliary motors of Pumps 0 8 5 No AP1 433 First Priority Motor Number Drive ID Run Priority 1 5 1 No AP1 44 Display the number of lag motor...

Page 16: ...stage Freq 4 Low Freq High Freq 40 00 Yes AP1 74 5 AUX motor stop frequency Destage Freq 5 Low Freq High Freq 40 00 Yes AP1 755 6 AUX motor stop frequency Destage Freq 6 Low Freq High Freq 40 00 Yes AP1 76 7 AUX motor stop frequency Destage Freq 7 Low Freq High Freq 40 00 Yes AP1 77 8 AUX motor stop frequency Destage Freq 8 Low Freq High Freq 40 00 Yes AP1 78 PID Parameter Sharing Lead Drive to La...

Page 17: ...23 59 hr min 00 00 Yes AP1 98 Pump Run Time Clear selection PmpRunTime Clr 0 None 0 None Yes 1 All 2 Pump 1 3 Pump 2 4 Pump 3 5 Pump 4 6 Pump 5 7 Pump 65 8 Pump 7 9 Pump 8 1 Set PID 01 to Yes to configure AP1 40 2 Set AP1 40 to Contactor Lag to configure AP1 41 3 When AP 01 is set to 1 enter motor number When set to 2 3 or 4 enter the Drive ID 4 API 60 only appears when AP1 40 is set to 3 Fixed La...

Page 18: ...AP1 24 and AP1 25 AP1 24 Fill Step Set After Pre PID operation time if feedback has not reached the AP1 23 Soft Fill Set exit amount the PI Reference setpoint will automatically change to this setpoint AP1 24 Soft Fill PI Reference amount and start the Soft Fill operation The Soft Fill PI Reference becomes the new PI setpoint Soft Fill steps are based on AP1 24 and AP1 25 AP1 25 Fill Step Time Thi...

Page 19: ... standby drives Standby drives can become part of the alternation sequence See Section 17 Standby For Network Fbk The parameter is not used AP1 43 MC2 18 Run Priority For MMC Contactor Lag Set the motor number for the first priority motor The priority will automatically change based on the setting of the Alternation Sequence AP1 49 ALT Sequence during operation For Follow Lead Fixed Lag Network Fb...

Page 20: ...ets the operating sequence For MMC Contactor Lag Fixed Lag and Follow Lead FILO First In Last Out Stops in the reverse order in which motors were started When motors start in the order of 1 2 3 4 they stop in the order of 4 3 2 1 FIFO First In First Out Stops in the same order in which motors were started When motors start in the order of 1 2 3 4 they stop in the order of 1 2 3 4 Op Time Order The...

Page 21: ...output frequency of the Main drive is higher than AP1 61 Stage freq1 When PID feedback deviation exceeds the PID reference setpoint by AP1 50 Stage Pres Dv And the above conditions are maintained for the AP1 53 Stage DT delay time For Network Fbk The parameter is not used AP1 54 MC2 13 Destage DT Sets the delay time to stop Lag drive or AUX motor when all the conditions for de staging are met When...

Page 22: ...operation frequency For Follow Lead Fixed Lag Network Fbk The parameter is not used AP1 58 MC2 06 Alt Timer Disp View Only Timer display for alternation For MMC Contactor Lag Aux Exchange AP1 55 Auto Ch Mode Operating time is counted for AUX motors only excluding the Main motor connected to the drive When AP1 58 Alt Timer Disp reaches the AP1 56 Alternate Time Alternate operation is performed acco...

Page 23: ...Motor s 1 8 based on the output frequency of the Main drive Example When priority is 1 2 3 4 and AUX motors 1 and 2 are operating de staging conditions for AUX 2 are met only when the output frequency of the Main drive reaches AP 71 Destage freq2 or less For Follow Lead Fixed Lag Network Fbk AP1 70 Destage Freq 1 is the only one used It is the de staging frequency for the Lag drives motors to stop...

Page 24: ...to the PID reference when the corresponding AUX motor is turned on Related to the number in AP1 44 Lag Pump Run Example When the number in AP1 44 Lag Pump Run becomes 1 the value in AP1 80 Aux1 Ref Comp is added to PID reference See AP1 44 Lag Pump Run Parameter description AP1 87 Aux8 Ref Comp is only used when all the following conditions are met If the conditions are not met the value of AP1 44...

Page 25: ...4 is set to 5 only 5 drives are used and 3 drives are in standby mode Standby drives can become part of the alternation sequence See Section 17 Standby For MMC Contactor Lag The parameter is not used AP1 95 MC2 28 RunTimeMonitor Shows the Pump number corresponding to the Drive ID set at COM 01 For the pump number Drive ID displayed view Run Time parameters AP1 96 PmpRunTime Day and AP1 97 PmpRunTi...

Page 26: ...3 M3 Motor 2 M2 Motor 1 M1 9 1 Follow Lead Conditions for Staging Lag Drives 1 Feedback is below the setpoint PID 11 PID Ref 2 Set and below the deviation amount AP1 50 Stage Pres Dv 2 Output Frequency of the Main Drive reached stage frequency AP1 61 Stage Freq 1 3 The stage delay time AP1 53 Stage DT has expired Follow Lead FIFO 9 2 Follow Lead Staging Details With the start of Drive 1 which is t...

Page 27: ...ntrolled drive a shift occurs making Drive 1 M1 the Main drive At this time Drive 1 M1 is operating as the Main drive and continues PI control If the feedback continues to be above the setpoint it will also eventually stop or go into Sleep mode if set This is the Last Out for the FILO setting Other Conditions Priority The drive priority AP1 45 Curr Prty 1 can be viewed as the running order The 4 d...

Page 28: ... Motor 2 M2 Motor 1 M1 10 1 Fixed Lag Conditions for Staging Lag Drives 1 Feedback is below the setpoint PID 11 PID Ref 1 Set and below the deviation amount AP1 50 Stage Pres Dv 2 Output Frequency of the Main Drive reached the stage frequency AP1 61 Stage Freq 1 of the Lag drive 3 The stage delay time AP1 53 Stage DT has expired Fixed Lag FILO 10 2 Fixed Lag Staging Details With the start of Drive...

Page 29: ...With FILO operation Drive 3 M3 is the first to stop Since Drive 3 M3 is the Main PI controlled drive a shift occurs making Drive 2 M2 the Main drive As de staging continues Drive 2 M2 decelerates and stops Since Drive 2 is now the Main PI controlled drive a shift occurs making Drive 1 M1 the Main drive At this time Drive 1 M1 is operating as the Main drive and continues PI control If the feedback ...

Page 30: ... top center of the display See Section 3 1 Status The drive motor pump with the longest operating time among the operating motors is moved to lowest priority last position The run priority will change when the number of motors in operation increases or decreases Priority is also arranged separately for operating motors and stopped motors See Section 15 Priority Change based on User Setting Time Th...

Page 31: ...ockey Pump drive can build and maintain pressure it will be the only one to operate If it cannot build pressure a Lag drive will operate With a Lag drive running the Jockey Pump drive will run for the stop delay time set in MC2 27 Jockey Dly T then stop Conditions for Jockey Pump starting 1 Drive is in Ready mode with run command applied 2 Feedback is below the setpoint PID 11 PID Ref 1 Set and be...

Page 32: ... stopped after Drive 2 started and after the Jockey delay time With two drives motors pumps running Drive 3 is the Main PI controlled drive The feedback has increased to a level above the setpoint When the three conditions for de staging Lag drives are met feedback above setpoint frequency reaches de staging frequency and the delay time has expired Drive 3 Main decelerates and eventually stops Wit...

Page 33: ...t transfers control of the Lead Lag system to the next priority drive If other trips occur Lead Lag operation also continues except for the drive that tripped If Pipe Broken occurs in the Lead Drive it is considered to be a trip for entire system so the entire system operation is stopped When the run priority is M1 M2 M3 M4 M5 M6 M7 M8 if Interlock 3 or any trip occurs in Drive 3 the priority is c...

Page 34: ...top or Sleep of the system when all drives are stopped When the alternating sequence AP1 49 ALT Sequence is set to either FILO or FIFO priority is changed by one step Example When priority is 1 2 3 4 shown as 4321 at AP1 45 Drive ID 1 is the first priority first to run After alternating the priority is changed to 3 2 1 4 making Drive ID 1 the second priority and making Drive ID the first priority ...

Page 35: ...ump Run Time Clear selection PmpRunTime Clr 0 None 0 None 1 All 2 9 Pump 1 Pump 8 When clearing the operating time of all motors with AP1 98 PmpRunTime Clr at the Lead Drive the run priority AP1 43 Run Priority is arranged based on lowest Drive ID COM 01 Int485 St ID among all drives The new run priority does not include drives that are interlocked in standby mode Priority is arranged when 1 the o...

Page 36: ...time 00 50 Operating Drive ID 2 Op time 02 00 Operating Drive ID 4 Op time 01 30 Stopped Drive ID 5 Op time 01 50 Stopped Priority for Stopped motors pumps The table below shows a case where the operating time of Drive ID 5 was cleared at Step 2 and priority changed to Priority 4 lowest among stopped drives Then at Step 3 the run time was set to 2 00 minutes and priority changed to Priority 5 Step...

Page 37: ...es the drive with the lowest Drive ID becomes the Lead drive When the HAND or OFF button is pressed making the Lead drive operate in Manual Mode When digital Inputs set to FWD JOG or REV JOG are activated When changes are made to the following parameters the Drive ID COM 01 Lead Lag Sel AP1 40 of Pumps AP1 42 If the Lead drive trips on a Broken Pipe fault the entire system is stopped without switc...

Page 38: ...ves operate under normal Lead Lag system operation The other 2 drives become Standby drives Below are conditions in which a Standby drive is brought into the normal Lead Lag system operation When the alternating sequence AP1 49 ALT Sequence is set to FILO or FIFO alternation occurs When all drives are stopped due to high feedback and brings in a standby drive When any drive is put into manual mode...

Page 39: ...t into the Lead Lag operation The new priority order is based on the operating time When all drives are stopped due to high feedback alternation occurs and brings in a standby drive s When all drives are stopped due to removal of run command from Lead drive alternation occurs When any drive is put into manual mode HAND or OFF button pressed When any drive trips When any drive is interlocked ...

Page 40: ...Set 0 6000 0 0 PSI Feedback must reach above setpoint to go into Sleep mode MC2 39 PID 61 Sleep Bst Freq 0 00 0 Hz To build pressure before entering Sleep Mode frequency to which drive will accelerate to Setting of 0 00 Hz disables Sleep Boost Low Freq High Freq When Sleep mode conditions of Sleep Freq PID 62 and Delay Time PID 63 are met before entering Sleep mode the output frequency is accelera...

Page 41: ... Up Symptom If Drives pumps cycle on and off and do not get up to speed Cause Sleep and Wake Up settings Solution 1 Extend Sleep Delay Time MC2 40 PID 62 longer than Accel Time MC2 09 DRV 03 Solution 2 Increase PID 25 Proportional gain to improve response ...

Page 42: ...dition if the feedback signal remains below the Lost Feedback Level AP2 57 If the feedback signal increases above the Lost Feedback Level AP2 57 the drive will perform Auto fault resets restarts based on the settings of PRT 09 Retry Number and PRT 10 Retry Delay time The default settings for PRT 09 and PRT 10 are Retry 3 times every 5 seconds If the fault is reset the drive resumes operation Also ...

Page 43: ...9 Acc Time MC2 24 DataShare MC2 40 PID Sleep 0 DT MC2 10 Dec Time MC2 25 All CommErr MC2 41 PID Sleep0 Freq MC2 11 Stage Pres Dv MC2 32 PID Ref 1 Set MC2 42 PID WakeUp0 DT MC2 12 Stage DT MC2 33 PID Fdb Source MC2 43 PID WakeUp0Dev MC2 13 Destage DT MC2 34 PID I Time 1 MC2 45 Stop Mode MC2 14 Destage Pres MC2 35 PID Unit Sel Macro Parameter Original Parameter Name LCD Display Setting Range Default...

Page 44: ...n problems occur all Drives trip with Comm Err and stop The first drive to clear the Comm Err becomes Lead drive When AP1 79 All CommErr is No When communication problems occur only the drive having the problem trips on Comm Err and stops The remaining drives are automatically sorted in the accordance with their Drive ID and normal Lead Lag operation continues Other conditions Comm Err is only gen...

Page 45: ...890053 02 00 ...

Page 46: ... 02 00 22 Revision History Manual Software Rev Date Edition Changes Version Date View Parameter 00 11 2021 Pump Lead Lag Initial Release 202 00 Main 11 26 2020 DRV 96 CNF 10 201 00 IO 9 16 2020 DRV 98 CNF 12 ...

Page 47: ...BENSHAW 615 Alpha Drive Pittsburgh PA 15238 Phone 412 968 0100 Fax 412 968 5415 BENSHAW Canada 550 Bright Street Listowel Ontario N4W 3W3 Phone 519 291 5112 Fax 519 291 2595 ...

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