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Programming Your Application
6-15
590+ Series DC Digital Converter
CALIBRATION
Parameter
Tag
Range
ARMATURE I (A9)
25
UNIPOLAR / BIPOLAR
Selects operation of the current meter output (terminal A9), either bipolar or unipolar.
SPDFBK ALM LEVEL
180
0.0 to 100.0 % (h)
The speed feedback alarm compares speed feedback to armature voltage. The alarm level is
the threshold which the difference between the two signals should exceed for the alarm to
activate.
STALL THRESHOLD
263
0.00 to 200.00 %
Stall comparator current feedback threshold level.
STALL TRIP DELAY
224
0.1 to 600.0 s
Stall comparator time-out delay before stall output becomes true.
STALL THRESHOLD
STALL TRIP DELAY
Comparator
CURRENT FEEDBACK
DELAY
STALL TRIP
AT ZERO SETPOINT
OVERSPEED LEVEL
188
0.00 to 200.00 %
Overspeed alarm threshold.
Note: SPEED FEEDBACK is internally clamped to 110%. when ARM VOLTS FBK or
ANALGO TACH are selected.
FIELD I CAL
182
0.9800 to 1.1000
(FIELD I CAL.)
Trim adjustment of the motor field current to give exactly 100% at the required actual
current value (e.g. 1.5A etc.). Note:- Primary field calibration is achieved by adjusting the
FIELD CURRENT parameter (CONFIGURE DRIVE function block).
POSITION COUNT
267
0x0000 to 0xFFFF
Reserved parameter for use by SSD Drives.
The POSITION COUNT and POSITION DIVIDER parameters allow basic position control
using a PLC (programmable logic controller), the optional COMMS techbox, and a speed
feedback encoder mounted on the motor shaft.
The position counter counts pulses is hexadecimal format. It begins incrementing from
0000 when you start the drive in the forward direction, then rolls over to 0000 on the count
after FFFF. If you start and run the drive in reverse, the counter begins at 0000, rolls over to
FFFF and then counts down to 0000. On reaching 0000, the counter rolls over to FFFF on
the next count. After the drive is stopped and/or restarted, the counter retains its count.
To read the position count using a PLC, enable CONFIGURE ENABLE and connect the
POSITION COUNT output in the CALIBRATION function block to a free serial PNO slot
(PNO 112 to 120) using ConfigEd Lite or the MMI. The PNO parameters are located in the
SERIAL LINKS::PNO CONFIG menu.
POSITION DIVIDER
275
1 to 30000
Reserved parameter for use by SSD Drives.
The divider provides scaling capability. The divider scales the 1000 pulses per revolution
provided by the encoder before the pulses reach the position counter. A separate register
accumulates the remainders.