Delta DVP-ES2 - Manual (Page 291)

3 . I n s t r u c t i o n S e t
3 - 1 7 5
Points to note:
1. When the calculation results exceed the max frequency of PLC, the output frequency will
be set as 0.
2. When the total of ramp-up and ramp-down time exceeds the total time for operation, PLC
will change the total time for operation (S+2) into “ramp-up time (S+3) + ramp-down
time (S+4) + 1” automatically.
Explanation on operands:
S+0, S+1: Total number of pulses for operation (32-bit)
S+2: Total time for operation (unit: ms)
S+3: Ramp-up time (unit: ms)
S+4: Ramp-down time(unit: ms)
D+0, D+1: Optimal max output frequency (unit: Hz) (32-bit)
D+2: Optimal start frequency (Unit: Hz)
n: Reserved
K11: Conversion from Local Time to Local Sidereal Time
Unlike the common local time defined by time zones, local sidereal time is calculated based on
actual longitude. The conversion helps the user obtain the more accurate time difference of
each location within the same time zone.
Explanation on operands:
S+0, S+1: Longitude (32-bit floating point value; East: positive, West: negative)
S+2: Time zone (16-bit integer; unit: hour)
S+3~ S+8: Year, Month, Day, Hour, Minute, Second of local time (16-bit integer)
D+0~D+5: Year, Month, Day, Hour, Minute, Second of the converted local sidereal time (16-bit
integer)
n: Reserved
Example:
Input: Longitude F121.55, Time zone: +8, Local time: AM 8:00:00, Jan/6/2011
Conversion results: AM 8:06:12, Jan/6/2011
K12: Proportional Value Calculation Function of Multi-point Areas (16-bit values)
Explanation on operands (16-bit values):
S: input value
S+1, S+2….. S+n: set values of multi-point areas. S+1 must be the minimum value, S+2 must
be larger than S+1 and so on. Therefore, S+n must be the maximum value.
D: output value gotten from the proportional value calculation
D+1, D +2 … D+n: the range of values gotten from the proportional value calculation