Page 701 - Mechanical Engineers' Handbook (Volume 2)

692 General-Purpose Control Devices

(a)

(b)

CMD := AUTO_CMD & AUTO_MODE OR MAN_CMD & NOT MAN_CMD_CHECK & NOT

AUTO_MODE;
CMD_TMR(IN := CMD, PT := T_CMD_MAX);

ALRM_FF(S1 := CMD_TMR.Q & NOT FBDK, R := ACK);
ALRM := ALRM_FF.Q1;
(c)
Figure 10 Programmable controller programming example.