GE AF-650 GP Design Manual page 52

3.12.2 Safe Stop Commissioning Test
After installation and before first operation, perform a commissioning test of an installation or application making use of AF-650 GP Safe Stop.
Moreover, perform the test after each modification of the installation or application, which the AF-650 GP Safe Stop is part of.
NB!
A passed commissioning test is mandatory for fulfilment of Safety Category 3 by such an installation or application.
The commissioning test (select one of cases 1 or 2 as applicable):
Case 1: restart prevention for Safe Stop is required (i.e. Safe Stop only where par. E-07 Terminal 37 Safe Stop is set to default value [1]:
1. Remove the 24 V DC voltage supply to terminal 37 by the interrupt device while the motor is driven by the AF-650 GP (i.e. mains supply is not interrupted).
The test step is passed if the motor reacts with a coast and the mechanical brake (if connected) is activated, and if an Keypad is mounted, the alarm
"Safe Stop [A68]" is displayed.
2. Send Reset signal (via Bus, Digital I/O, or [Reset] key). The test step is passed if the motor remains in the Safe Stop state, and the mechanical brake (if
connected) remains activated.
3. Reapply 24 V DC to terminal 37. The test step is passed if the motor remains in the coasted state, and the mechanical brake (if connected) remains
activated. Step 1.4: Send Reset signal (via Bus, Digital I/O, or [Reset] key). The test step is passed if the motor becomes operational again.
The commissioning test is passed if all four test steps 1.1, 1.2, 1.3 and 1.4 are passed.
Case 2: Automatic Restart of Safe Stop is wanted and allowed (i.e. Safe Stop only where par. E-07 Terminal 37 Safe Stop is set to [3]:
1. Remove the 24 V DC voltage supply to terminal 37 by the interrupt device while the motor is driven by the AF-650 GP (i.e. mains supply is not interrupted).
The test step is passed if the motor reacts with a coast and the mechanical brake (if connected) is activated, and if an Keypad is mounted, the warning
"Safe Stop [W68]" is displayed.
2. Send Reset signal (via Bus, Digital I/O, or [Reset] key). The test step is passed if the motor remains in the Safe Stop state, and the mechanical brake (if
connected) remains activated.
3. Reapply 24 V DC to terminal 37.
The test step is passed if the motor becomes operational again. The commissioning test is passed if all three test steps 2.1, 2.2, and 2.3 are passed.
NB!
The Safe Stop function of AF-650 GP can be used for asynchronous and synchronous motors. It may happen that two faults occur in the frequency converter's
power semiconductor. When using synchronous motors this may cause a residual rotation. The rotation can be calculated to Angle=360/(Number of Poles). The
application using synchronous motors must take this into consideration and ensure that this is not a safety critical issue. This situation is not relevant for
asynchronous motors.
NB!
In order to use the Safe Stop functionality in conformance with the requirements of EN-954-1 Category 3, a number of conditions must be fulfilled by the
installation of Safe Stop. Please see section Safe Stop Installation for further information.
NB!
The frequency converter does not provide a safety-related protection against unintended or malicious voltage supply to terminal 37 and subsequent reset.
Provide this protection via the interrupt device, at the application level, or organisational level.
For more information - see section Safe Stop Installation.
AF-650 GP Design Guide
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