PG Option Cards
To have a more precise speed control the inverter can be equipped with a PG option card for the connection of a pulse generator. Three different PG cards can be used, the PG-B2, the PG-X2 and the PG-F2 card. Refer to
page 2-24, Option Card Models and Specifications
to see details.
6
PG Setup
Related Parameters
Parameter
No.
F1-01
F1-05
PG constant
PG rotation
Name
Factory
Setting
Change during
Operation
V/f i i
1
2
60°
No
No
No
No
No
No
No
No
No
No
Control Methods
Open
Loop
Vector
Closed
Loop
Vector
Q
1024
Closed
Loop
Vector
(PM)
No
-
-
Q
2048
Q
0
No
-
No
No
No
-
A
No
No
Q
1
A
A
A
F1-06
F1-21
F1-22
PG division rate (PG pulse monitor)
Absolute encoder resolution
Magnet position offset
Using PG Speed Control Card
There are three types of PG Speed Control Card that can be used in Closed Loop Vector control:
•
PG-B2: A/B-phase pulse input, compatible with open collector outputs.
•
PG-X2: A/B/Z-phase pulse input, compatible with line drivers (RS-422).
•
PG-F2: Hiperface y
/ EnDat encoder feedback.
For the mounting instructions, specifications and connection diagrams refer to
page 2-24, Installing and Wiring Option Cards
.
IMPORTANT
If Open Loop Vector control for IM is used and a PG-B2/X2 card is installed, the speed detected by the
PG card is displayed in the monitor parameter U1-05. Therefore the PG constant has to be set in parameter F1-01. The direction of the speed detection can be changed by parameter F1-05.
To change the U1-05 value to the internally calculated speed value remove the PG card.
Setting Number of PG Pulses (F1-01)
Set the number of PG (Pulse Generator/Encoder) pulses in pulses per revolution.
If a PG-F2 card is installed, the encoder type must be set in parameter n8-35 before the PG constant is set. The possible set values for F1-01 depend on the n8-35 setting. The following resolutions can be set:
•
•
for Hiperface y
: 1024 for EnDat: 512, 1024, 2048
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Suit the PG Rotation Direction and Motor Rotation Direction (F1-05)
Parameter F1-05 can be used to change the encoder signal direction if it is wrong.
•
•
If F1-05 is set to 0 the inverter expects channel A to lead 90° before channel B (Sin-channel leads 90° before Cos-channel on PG-F2 card) if a forward command is applied (FWD means counterclockwise rotation seen from the shaft side).
If F1-05 is set to 1 the inverter expects channel B to lead 90° before channel B (Cos-channel leads 90° before Sin-channel on PG-F2 card) if a forward command is applied.
IMPORTANT
If Closed Loop Vector Control for PM motors is used, an encoder offset autotuning must be performed if parameter F1-05 is changed.
Setting PG Pulse Monitor Output Division Ratio (F1-06)
This function is enabled only when a PG-B2 speed feedback card is used. Set the division ratio for the PG pulse monitor output. The set value is expressed as n for the higher place digit, and m for the two lower place digits. The dividing ratio is calculated as follows:
Dividing ratio = (1 + n)/m (Setting range) n: 0 or 1, m: 1 to 32
F1-06 =
n
m
The division ratio can be set within the following range: 1/32
≤ F1-06 ≤ 1. For example, if the division ratio is
1/2 (set value 2), half of the number of pulses from the PG are output at the pulse monitor.
Setting Number of Gear Teeth Between PG and Motor (F1-12 and F1-13)
If there are gears between the motor and PG, the gear ratio can be set using F1-12 and F1-13.
When the number of gear teeth has been set, the number of motor rotations within the Inverter is calculated using the following formula.
No. of motor rotations (r/min.) = No. of input pulses from PG
× 60 / F1-01 × F1-13 (No. of gear teeth on PG side) / F1-12 (No. of gear teeth on motor side)
Setting the Absolute Encoder Resolution (F1-21)
If a Hiperface y
encoder is used, the serial line resolution must be selected by parameter F1-21 according to the encoder data sheet. The possible resolution setting depends on the encoder selection (n8-35=5):
•
•
Hiperface y
: 0, 1 or 2 (16384, 32768, 8192)
EnDat: 2 (fixed to 8192)
Setting the Magnet Position Offset (F1-22)
Parameter F1-22 can be used to set the offset between the magnet and the encoder zero position. The value is
automatically set during the PM motor autotuning or encoder offset auto tuning (refer to
page 4-8, PM Motor
Encoder Offset Tuning
).
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73
6
Fault Detection
Related Parameters
Parameter
No.
F1-02
F1-03
F1-04
F1-08
F1-09
F1-10
F1-11
F1-14
F1-18
F1-19
F1-21
F1-22
F1-24
Name
Operation selection at PG open circuit (PGO)
Operation selection at overspeed (OS)
Operation selection at deviation (DEV)
Overspeed detection level
Overspeed detection time
Speed deviation detection level
Speed deviation detection time
PG open-circuit detection delay time
DV3 detection selection
DV4 detection selection
Absolute encoder resolution
Magnet position offset
PGO detection Level at stop
Factory
Setting
Change during
Operation
1
1
3
115%
0.0 sec.
10%
0.5 sec.
2.0 s
1
1024
2
60°
20%
No
No
No
No
No
No
No
No
No
No
No
No
No
V/f
-
-
-
-
-
-
-
-
-
-
-
-
-
Control Methods
Open
Loop
Vector
Closed
Loop
Vector
-
-
-
-
-
-
-
-
-
-
-
-
-
A
A
A
A
A
A
A
A
-
-
-
-
-
A
A
A
A
A
A
A
A
A
A
Closed
Loop
Vector
(PM)
A
A
A
Detecting PG Open Circuit During Run (F1-02 and F1-14)
Parameter F1-02 selects the stopping method when a PG disconnection is detected.
PG open (PGO) is detected only when the inverter is running at least with a frequency reference higher than
1% of the maximum output frequency or above the minimum frequency (E1-09) and the PG feedback signal is missing for the time set in F1-14 or longer.
Detecting Motor Overspeed (F1-03, F1-08 and F1-09)
An overspeed (OS) is detected when the motor speed continues to exceed the set frequency value in F1-08 for a time longer than set in F1-09. After detecting an overspeed (OS), the Inverter stops according to the setting in F1-03.
Detecting a Speed Deviation between the Motor and Speed Reference (F1-04, F1-10 and F1-11)
A speed deviation fault is detected when the speed deviation (i.e., the difference between the speed reference and the actual motor speed) is too large. Speed deviation (DEV) is detected only after a speed agreement
(speed reference and actual motor speed are within the setting range of L4-02) and if a speed deviation higher than the set value in F1-10 continues for longer than the time set in F1-11. After a speed deviation is detected, the Inverter stops according to the setting in F1-04.
Detecting a Wrong Rotation Direction DV3 (F1-18, Closed Loop Vector for PM only)
A DV3 fault indicates a wrong motor rotation direction. It is detected if
•
the speed deviation is higher than 30% and
•
the internal torque reference value and the acceleration have opposite signs
The fault is detected after the time F1-18 x 5 ms.
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74
Detecting a Wrong Rotation Direction DV4 (F1-19, Closed Loop Vector for PM only)
A DV4 fault indicates a wrong motor rotation direction. It is detected if
•
the reference direction and the motor rotation direction have opposite signs and
•
the deviation is higher than the value of parameter F1-19 (set in encoder pulses).
Machine Data Copy Function
If a Hiperface y
or an EnDat encoder is used, the motor and encoder data can be saved in the encoder memory and can be read out later, e.g. if a motor has been replaced to an equal type or if the inverter is replaced.
Related Parameters
Parameter
No.
F1-25
F1-26
Encoder copy selection
Encoder write protection
Name
Factory
Setting
Change during
Operation
0
0
No
No
V/f
No
No
Control Methods
Open
Loop
Vector
Closed
Loop
Vector
No
No
No
No
Closed
Loop
Vector
(PM)
A
A
Saved Parameters
The following parameters are saved in the encoder memory:
• E1-04
• E1-06
• E1-13
• E5-02
• E5-03
• E5-04
• E5-05
Motor maximal speed
Motor rated speed
Motor rated voltage
Motor rated power
Motor rated current
Motor pole number
Motor line-to-line resistance
• E5-06
• E5-07
• E5-09
• F1-01
• F1-05
• F1-21
• F1-22
Motor d axis inductance Ld
Motor q axis inductance Lq
Motor voltage constant Ke
PG pulse constant
PG rotation direction
Absolute encoder selection
Magnet position offset
Saving Parameters Into the Encoder Memory
To save parameters in the encoder memory, the Encoder write protection must be off (F1-26 = 1) and the parameter F1-25 has to be set to 1 (“ERED, INViENC WRITING” is displayed during the save process).
The display of F1-25 automatically returns to 0 when the operation is finished (“ERED, WRITE COM-
PLETE” is displayed). If any fault occurs the fault code will be displayed (refer to
page 7-17, Machine Data
Copy Function Faults
).
Parameters which had been stored in the encoder before will be overwritten.
Read Parameters From the Encoder Memory
To read parameters form the encoder memory the parameter F1-25 must be set to 2. Before reading the parameters make sure, that the correct control mode and encoder type are selected in the parameters A1-02 and n8-35. If parameter n8-35 has to be changed, cycle the power supply after changing it and set parameter F1-25 to 2 afterwards (“ECPY, ENCiINV COPIYING” is displayed during the read process). The display of F1-25 automatically returns to 0 when the operation is finished (“ECPY, COPY COMPLETE” is displayed). If any fault occurs the fault code will be displayed (refer to
page 7-17, Machine Data Copy Function Faults
).
6
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75
6
Verify Saved Parameters
To compare the parameters stored in the inverter and encoder the parameter F1-23 must be set to 3 (“EVRFY,
DATA VERIFYING” is displayed during the verify process).
If the data are identically, the display will show “EVRFY, VERIFY COMPLETE”.
If the data do not match, “EVRFY, VERIFY ERROR” will be displayed.
IMPORTANT
In order to perform the WRITE/COPY function:
• The motor must not turn and the drive must be in baseblock condition
• for EnDat the OEM1 area1 of the EEPROM must be available (address 64 to 255)
• for Hiperface y the data field DF#0 must be available.
• A CPF03/24 must not be active.
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