Avtron ADDvantage-32, Manual

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Control Block Description
ADDvantage-32
4-105
Inputs (Cont.)
RES1
Digital
RES2 Digital
RES3 Digital
RES4 Digital
HLD1 Digital
HLD2 Digital
HLD3 Digital
HLD4 Digital
DO1 Digital
DO2 Digital
DO3 Digital
DO4 Digital
2. Outputs
DIA1
Analog
DI1 Digital
3. Implementation
This block uses the GSBX board to generate four diameter readings. It does this by
calculating the distance the material has traveled based on one revolution of the roll. The
GSBX board has a pulse generator input to determine the distance and four inputs (one
for each roll), which record once per revolution.
CALD1, RATE1, MAX DIA1, MIN DIA1, and DIA1 all point to the first diameter’s
parameters. The other three diameter parameters are in consecutive order.
If the RES1 is high, then DIA1 = IDIAM1.
If HLD1 is high, the output is frozen at its last value. RES1 has a higher priority.
If RES1 and HLD1 are low, then DIA1 is calculated as follows:
DIA1 = (Edges read since last pickup reading) * CALD1/PI
The first reading after a hold or reset is ignored by the block. This is to avoid a false
diameter recording.
RATE1 limits the rate of change of DIA1 when RES1 is not high. This is set in diameter
process units per second.
DIA1 is limited to be within MAX DIA1 and MIN DIA1. This is also true while RES1 is
active.