Omron SX-F, Инструкция по эксплуатации

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98
Main Setup [200]
Section 11-2
Communication information
Note For a 1024 pulse encoder [22F] will count 1024 * 4 = 4096 pulse per turn.
11-2-5 Motor Protection [230]
This function protects the motor against overload based on the standard
IEC60947-4-2.
Motor I
2
t Type [231]
The motor protection function makes it possible to protect the motor from
overload as published in the standard IEC 60947-4-2. It does this using Motor
I2t Current, [232] as a reference. The Motor I2t Time [233] is used to define
the time behaviour of the function. The current set in [232] can be delivered
infinite in time. If for instance in [233] a time of 1000 s is chosen the upper
curve of Fig. 65 is valid. The value on the x-axis is the multiple of the current
chosen in [232]. The time [233] is the time that an overloaded motor is
switched off or is reduced in power at 1.2 times the current set in [232].
Communication information
Note When Mot I2t Type=Limit, the VSD can control the speed < MinSpeed to
reduce the motor current.
Motor I
2
t Current [232]
Sets the current limit for the motor I
2
t protection.
Modbus Instance no/
DeviceNet no:
42912
Profibus slot/index 168/71
EtherCAT index (hex) 4b60
Fieldbus format Long, 1=1 quad encoder pulse
Modbus format Int
Default: Trip
Off 0 I
2
t motor protection is not active.
Trip 1
When the I
2
t time is exceeded, the VSD will trip on “Motor
I
2
t”.
Limit 2
This mode helps to keep the inverter running when the
Motor I2t function is just before tripping the VSD. The trip is
replaced by current limiting with a maximum current level
set by the value out of the menu [232]. In this way, if the
reduced current can drive the load, the VSD continues run-
ning.
Modbus Instance no/
DeviceNet no:
43061
Profibus slot/index 168/220
EtherCAT index (hex) 4bf5
Fieldbus format UInt
Modbus format UInt
231 Mot I
2
t Type
Stp M1: Trip
A
Default: 100% of I
MOT
Range: 0–150% of I
MOT
(set in menu [
224
])
232 Mot I
2
t Curr
Stp 100%
A