Parker Hannifin G2 manual Velocity Monitor and Analog Monitor, Brake Signal, Functions

5Functions

5.6.2Velocity Monitor and Analog Monitor

The current velocity value of the motor is output to “VEL” of the CN3 analog monitor interface as the velocity monitor signal.

The signal sensitivity of the velocity monitor ([V/rps] in case of a rotating DYNASERV motor and [V/mps] in case of a linear LINEARSERV motor) can be obtained by multiplying the #69 Velocity monitor gain parameter setting by the #356 Digital velocity sensitivity monitor value. For example, if the setting of #69 is 6.55V/8192 digits and the value of #356 is 4800 [digit/rps] in a rotating motor, the signal sensitivity of the velocity monitor is 3.84 [V/rps]. The velocity monitor signal is output in the range of ± 6.55V.

Moreover, it is possible to output only the AC element of the current velocity value of the motor via the setting of the #75 Velocity monitor selection parameter.

One of the data items below is output to “AMON” of the CN3 analog monitor interface as an analog monitor signal.

The content of the analog monitor can be selected by the #70 Analog monitor selection parameter. Depending on the selected content, the signal sensitivity is adjusted using the corresponding monitor gains #71 to 74. The analog monitor signals are output in the range of ± 6.55V.

Analog monitor selection	Unit	Monitor gain
Position deviation	Pulse	#71 Positioning error monitoring gain (Analog monitor)
Test operation response	Pulse	#72 Test operation monitoring gain (Analog monitor)
Position command value	Pulse	#73 Position monitoring gain (Analog monitor)
Position current value	Pulse
Position command differential value	pps	#74 Position differential value monitor gain (Analog
Position current differential value	pps	monitor)

[Related parameters]

#69 Velocity monitoring gain #70 Analog monitor selection

#71 Positioning error monitoring gain (Analog monitor) #72 Test operation monitoring gain (Analog monitor) #73 Position monitoring gain (Analog monitor)

#74 Position difference value monitor gain (Analog monitor) #74

#75 Velocity monitor selection

5.6.3 Brake Signal

BRK+ and BRK- are output to the TB2 external sensor interface as brake signal outputs that operate linked to the Servo ON status. The brake signal is a relay contact output. The contact opens when the brake should be applied such as when the power is disconnected or the driver is in Servo OFF status, and the contact short circuits when the brake should be released.

The Servo ON status and the brake signal operate according to the timing diagram shown below via the #89 Brake turn OFF delay time upon Servo ON and #90 Advanced brake turn ON before Servo OFF parameters.

Servo ON status ON

OFF

Open-circuit

Brake signal Short-circuit

#89#90

[Related parameters]

#89 Brake turn OFF delay time upon Servo ON #90 Advanced Brake turn ON before Servo OFF

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