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AnnexF/cmd_monitor_st.txt
author mjsousa
Sat, 25 Oct 2014 11:28:48 +0100
changeset 941 c2ef93412407
parent 0 fb772792efd1
permissions -rwxr-xr-x
Editing of error message to make it more clear.
0
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FUNCTION_BLOCK CMD_MONITOR
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 VAR_INPUT AUTO_CMD : BOOL ; (* Automated command *)
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          AUTO_MODE : BOOL ; (* AUTO_CMD enable *)
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            MAN_CMD : BOOL ; (* Manual Command *)
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        MAN_CMD_CHK : BOOL ; (* Negated MAN_CMD to debounce *)
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          T_CMD_MAX : TIME ; (* Max time from CMD to FDBK *)
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               FDBK : BOOL ; (* Confirmation of CMD completion
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                                by operative unit *)
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                ACK : BOOL ; (* Acknowledge/cancel ALRM *)
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 END_VAR
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 VAR_OUTPUT CMD : BOOL ;   (* Command to operative unit *)
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           ALRM : BOOL ;   (* T_CMD_MAX expired without FDBK *)
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 END_VAR
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 VAR CMD_TMR : TON ;    (* CMD-to-FDBK timer *)
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     ALRM_FF : SR ;     (* Note over-riding S input: *)
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 END_VAR                (* Command must be cancelled before
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                              "ACK" can cancel alarm *)
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 (* Function Block Body *)
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    CMD := AUTO_CMD & AUTO_MODE
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          OR MAN_CMD & NOT MAN_CMD_CHK & NOT AUTO_MODE ;
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    CMD_TMR (IN := CMD, PT := T_CMD_MAX);
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    ALRM_FF (S1 := CMD_TMR.Q & NOT FDBK, R := ACK);
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    ALRM := ALRM_FF.Q1;
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END_FUNCTION_BLOCK













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