A DB1.DBX 24.0
JCN READ

OPN "FOR CLOCK"

L DBW 0 // YEAR (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 0 // YEAR (TO PLC)

L DBW 2 // MONTH (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 1 // MONTH (TO PLC)

L DBW 4 // DAY (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 2 // DAY (TO PLC)

L DBW 6 // HOUR (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 3 // HOUR (TO PLC)

L DBW 8 // MINUTE (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 4 // MINUTE (TO PLC)

L DBW 10 // SECOND (FROM MP277)
ITB // CONVERT INTEGER TO BCD
T LB 5 // SECOND (TO PLC)

CALL "SET_CLK" // SET SYSTEM CLOCK
PDT :=#DandT // DATE AND TIME IN LOCAL VARIABLE
RET_VAL:=#GEL

SET // RESET:
R DB1.DBX 24.0 // CLOCK SET BIT


READ: CALL "READ_CLK" // READ SYSTEM CLOCK
RET_VAL:=#GEL
CDT :=#DandT // STORE DATE AND TIME IN LOCAL VARIABLE

L LB 0 // YEAR (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 12 // YEAR (TO MP277)

L LB 1 // MONTH (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 14 // MONTH (TO MP277)

L LB 2 // DAY (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 16 // DAY (TO MP277)

L LB 3 // HOUR (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 18 // HOUR (TO MP277)

L LB 4 // MINUTE (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 20 // MINUTE (TO MP277)

L LB 5 // SECOND (FROM PLC)
BTI // CONVERT BCD TO INTEGER
T DBW 22 // SECOND (TO MP277)

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