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IronHorse GSDA-AI-A8 User Manual – 1st Edition – 06/13/2019
Real-time Process Variable Descriptions
Rather than being a “setting” or a “switch” type parameter, parametres 70 through 74 on the
GSDA-AI-A8 are used to view (only) certain Real-Time “Process” variables going to/from the
GSDA-AI-A8. These parameters are mainly useful in troubleshooting a particular application, rather
than being of general-purpose use.
Parameter
Parameter Name
Description
70
Input Current to GSDA-AI-A8
This shows the instantaneous input loop current to the GSDA-AI-A8, in raw
ADC “steps”� Since the GSDA-AI-A8 uses a 12-bit A/D, the range of this
parameter can be from 0 to 4095, although it will not get to these extremes in
the typical 4-20 mA setup� The actual number is of less interest than whether
the numbers tend to “follow” a 4-20 mA input signal�
71
Target Speed to Drive from GSDA-
AI-A8
This shows the instantaneous “Target Speed” that the GSDA-AI-A8 has
calculated to make available to the GSD8 Drive, in the GSD8 Drive’s
Engineering Units, based on the Input Current flowing through P3 1 & 2 on
the GSDA-AI-A8, and the setting of GSDA-AI-A8 parameters 20 through 23�
72
Output Current to Drive from GSDA-
AI-A8
This shows the instantaneous output loop current from the GSDA-AI-A8, in
raw DAC “steps”� Since the GSDA-AI-A8 uses a 12-bit D/A, the range of this
parameter can be from 0 to 4095, although it will not get to these extremes in
the typical 4-20 mA setup� The actual number is of less interest than whether
the numbers tend to “follow” the GSD8 Drive’s Actual (S1 Pickup) “Tach” speed�
73
GSDA-AI-A8 Condition Flags (not yet
implemented)
Not yet implemented�
74
GSDA-AI-A8 Auto/Manual Switch
State
This shows the instantaneous state of the Auto/Manual switch input� A value
of zero means that the GSDA-AI-A8 will report “Manual” mode to the GSD8
Drive� A value of 1 equals “Auto” mode�
