51
interoperability among different vendor’s products. This section will focus primarily on the format of the
AC/DC drive profile I/O assemblies supported by the interface card, and the inverter data which their
various constituent elements map to.
Table 22: Output Instances 20 and 21 Detail
Instance
Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
20
0
Fault
Reset
Run
Fwd
1
2
Speed Reference (Low Byte)
3
Speed Reference (High Byte)
21
0
NetRef
NetCtrl
Fault
Reset
Run
Rev
Run
Fwd
1
2
Speed Reference (Low Byte)
3
Speed Reference (High Byte)
Output Instance Mapping Detail
Run Fwd: forward rotation command (0=forward rotation off, 1=forward rotation on). Maps to inverter
parameter 00.02, bit 0 (run command word, FWD bit).
Run Rev: reverse rotation command (0=reverse rotation off, 1=reverse rotation on). Maps to inverter
parameter 00.02, bit 1 (run command 6word, REV bit).
Fault Reset:
Inverter reset command (0=no action, 0→1 rising edge=reset). Ma
ps to inverter parameter
00.02, bit 2 (run command word, RST bit).
NetCtrl: Run/stop control source selection (0=local control, 1=network control). Maps to inverter
parameter 20.02 (Ext1 commands).
NetRef: Speed reference source selection (0=local control, 1=network control). Maps to inverter
parameter 22.03 (frequency ref 1 source).
Speed Reference: Inverter speed reference in RPM. Maps to parameter 00.04 (frequency command).
The speed reference component of the AC/DC drive profile output instances is always in units of RPM.
Therefore, the interface card applies the RPM-to-Hz conversion indicated in Equation 5 in order to
determine the appropriate frequency command value (in units of Hz) to be written to parameter 00.04.
120
poles
motor
of
number
x
RPM
Hz
=
Equation 5
The “number of motor poles” term which appears in the numerator of Equation 5 is obtained from the
setting of inverter parameter 99.07 (motor pole setting). Note that the value of 99.07 is read by the
interface card only at boot-up, so if the value of this parameter is changed, then the interface card must
be rebooted in order for it to read the new value from the inverter.
Table 23: Input Instances 70 and 71 Detail
Instance Byte
Bit 7
Bit 6 Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
70
0
Running1
Faulted
1
2
Speed Actual (Low Byte)
3
Speed Actual (High Byte)
71
0
At
Reference
Ref
From
Net
Ctrl
From
Net
Ready Running2
(REV)
Running1
(FWD)
Warning Faulted
1
Drive State
2
Speed Actual (Low Byte)
3
Speed Actual (High Byte)