GE AF-650 GP Series, Design And Installation Manual

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Bit 13, Voltage OK/limit exceeded:
Bit 13 = ’0’: There are no voltage warnings. Bit 13 = ’1’: The
DC voltage in the intermediate circuit of the adjustable
frequency drive is too low or too high.
Bit 14, Torque OK/limit exceeded:
Bit 14 = ’0’: The motor current is lower than the torque
limit selected in
F-43 Current Limit . Bit 14 = ’1’: The torque
limit in F-43 Current Limit is exceeded.
Bit 15, Timer OK/limit exceeded:
Bit 15 = ’0’: The timers for motor thermal protection and
thermal protection are not exceeded 100%. Bit 15 = ’1’:
One of the timers exceeds 100%.
All bits in the STW are set to ’0’ if the connection between
the Interbus option and the adjustable frequency drive is
lost, or if an internal communication problem has occurred.
9.3.3 Bus Speed Reference Value
Speed reference value is transmitted to the adjustable
frequency drive in a relative value expressed as %. The
value is transmitted in the form of a 16-bit word; in
integers (0-32767) the value 16384 (4000 Hex) corresponds
to 100%. Negative figures are formatted by means of 2’s
complement. The Actual Output frequency (MAV) is scaled
in the same way as the bus reference.
Figure 9.4
The reference and MAV are scaled as follows:
Figure 9.5
RS-485 Installation and Set... AF-650 GP
TM
Design and Installation Guide
9-10 DET-767A
9 9