GE 90-30/20/Micro manual

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When %Q or %M references are used with retentive coils, or are used as function block outputs, the contents are retained through power loss and RUN-TO-STOP-TO-RUNtransitions. Retentive coils include retentive coils —(M)—, negated retentive coils —(/M)—, retentive SET

coils —(SM)—, and retentive RESET coils —(RM)—.

The last time a %Q or %M reference is programmed on a coil instruction determines whether the %Q or %M reference is retentive or non-retentive based on the coil type. For example, if %Q0001 was last programmed as the reference of a retentive coil, the %Q0001 data will be retentive.

However, if %Q0001 was last programmed on a non-retentive coil, then the %Q0001 data will be non-retentive.

2-22 Series 90-30/20/Micro Programmable Controllers Reference Manual– September 1998 GFK-0467K