51304493-200 Honeywell

ATTENTION

When MODE is ' ;Manual,' OPBIAS is not used (because OP is not calculated). Consequently,

when MODE changes to Manual, OPBIAS is not recomputed.

l You can store to OPBIAS only if the function block is inactive or MODE is 'Manual.' Hence,

prevent a bump in OP is prevented when the bias is changed.

l When you store values to OPBIAS, the following occurs.

o Total bias (OPBIAS) and fixed bias (OPBIAS.FIX) are both set to a new value.

l There are no limit checks applied when you store the OPBIAS. However, after the bias is added

to the calculated variable (CV), the result is compared against the OP limits and clamped, if

necessary.

l You can store to OPBIAS.FIX only if the function block is inactive and SVP_REGCTL is

configured with the control algorithm equation as 'E.' When you store to OPBIAS.FIX, the

following occurs.

o Total bias (OPBIAS) and fixed bias (OPBIAS.FIX) are both set to a new value.

10.25.9 Time-out monitoring

If MODE is set to 'Cascade,' SVP_REGCTL channel monitors its SP input value (that is, primary

input) for time-out. If a valid SP value is not received within the predefined time, the SVP_REGCTL

channel invokes time-out processing. The time-out time (in seconds) is specified by TMOUTTIME.

l Enable time-out monitoring by setting TMOUTTIME to a non-zero value.

l Disable time-out monitoring by setting TMOUTTIME to zero.

10.25.10 Time-out processing

A time-out can occur for several reasons communication error, inactivation of primary block, and

so on. If an input times-out, SVP_REGCTL channel performs setting a time-out flag (TMOUTFL),

requesting the primary block to initialize, and shedding the SVP_REGCTL channel to a predefined

mode (TMOUTMODE).

If MODE is set to 'Cascade' and the SP time-out, the SVP_REGCTL channel performs the following:

l Sets a time-out flag (TMOUTFL).

l Requests the primary to initialize.

ATTENTION

In SVP_REGCTL channel, the primary can be an ENHGENLIN block and AUXILIARY

Function block from C300-20mS CEE Controller and no initialization happens to it.

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