Motorola V186 User Manual - Page 43

Analog Output Modules, Keep Last Value KLV and Predefined Value PDV - Each output can

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Analog Output Modules The Analog Output (AO) modules have four optically-isolated analog output channels for controlling user devices (see Figure 1). Each channel has two possible outputs: 0-20 mA Interface industry standard current output and 0-5 V Interface industry standard voltage output. Only one of the outputs can be enabled in a particular channel - either current or voltage. The module's digital to analog converter resolution is 14 bit. The Analog Output channels are optically isolated from the module internal logic circuits. The modules are fully calibrated and can be tested and recalibrated in the field. Each analog output has three status LEDs, Vout, Iout, and CAL which represent the calibration status of each output for voltage/current. The AO Module Configuration includes: ƒ AO Type - The analog outputs can be set to voltage, current, or raw data. ƒ AO Value - The analog outputs can be set to a numeric value (in the range of 0 to 16000) or either in voltage or current according to the output type. The values for voltage are 0 to 10 V and the values for current are 0 to 20 mA. ƒ AO Calibration - The upper and lower limits of analog outputs can be calibrated either as current (20mA upper limit and 4mA lower limit) or voltage (10V upper limit and 2V lower limit). Default upper and lower calibration limits are provided from the factory. ƒ "Keep Last Value" (KLV) and "Predefined Value" (PDV) - Each output can be configured to KLV or to a PDV. This value is maintained in the event of AO module failure or communication failure with the CPU. The predefined value can also be used during normal operation to force a value that masks the actual output value. ƒ Sleep Mode - Each AO module can be switched by the user application program to Sleep Mode. In Sleep Mode, the module does not function and the power consumption is minimized. During Sleep mode the user application program will get the predefined values for each output. ƒ I/O Legacy Resolution Parameter - In systems with both ACE3600 RTUs and legacy (MOSCAD/MOSCAD-L) RTUs, some MOSCAD/MOSCAD-L applications can be upgraded to ACE3600 without modifying the references to analog values in the applications ('C' or ladder). The I/O Legacy Resolution STS advanced parameter sets the Analog I/O bit resolution to either Actual (ACE3600) or Legacy (MOSCAD/MOSCAD-L). 39

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Analog Output Modules
The Analog Output (AO) modules have four optically-isolated analog output channels for
controlling user devices (see Figure 1). Each channel has two possible outputs: 0-20 mA
Interface industry standard current output and 0-5 V Interface industry standard voltage
output. Only one of the outputs can be enabled in a particular channel - either current or
voltage.
The module’s digital to analog converter resolution is 14 bit.
The Analog Output
channels are optically isolated from the module internal logic circuits. The modules are
fully calibrated and can be tested and recalibrated in the field.
Each analog output has three status LEDs, Vout, Iout, and CAL which represent the
calibration status of each output for voltage/current.
The AO Module Configuration includes:
±
AO Type - The analog outputs can be set to voltage, current, or raw data.
±
AO Value - The analog outputs can be set to a numeric value (in the range of 0 to
16000) or either in voltage or current according to the output type. The values for
voltage are 0 to 10 V and the values for current are 0 to 20 mA.
±
AO Calibration - The upper and lower limits of analog outputs can be calibrated -
either as current (20mA upper limit and 4mA lower limit) or voltage (10V upper
limit and 2V lower limit).
Default upper and lower calibration limits are provided
from the factory.
±
“Keep Last Value” (KLV) and “Predefined Value” (PDV) - Each output can be
configured to KLV or to a PDV. This value is maintained in the event of AO
module failure or communication failure with the CPU. The predefined value can
also be used during normal operation to force a value that masks the actual output
value.
±
Sleep Mode - Each AO module can be switched by the user application program
to Sleep Mode. In Sleep Mode, the module does not function and the power
consumption is minimized. During Sleep mode the user application program will
get the predefined values for each output.
±
I/O Legacy Resolution Parameter - In systems with both ACE3600 RTUs and
legacy (MOSCAD/MOSCAD-L) RTUs, some MOSCAD/MOSCAD-L
applications can be upgraded to ACE3600 without modifying the references to
analog values in the applications (‘C’ or ladder).
The I/O Legacy Resolution STS
advanced parameter sets the Analog I/O bit resolution to either Actual (ACE3600)
or Legacy (MOSCAD/MOSCAD-L).
39