Panasonic Micro-Imagechecker PV310 - Restrictions on Numeric Calculation Function

181
Cha
p
ter 7
Calculation
,
Anal
y
sis
,
and Out
p
ut of Ins
p
ection Results
7.2.9 Restrictions on Numeric Calculation Function
The values that can be handled during calculation
The PV310 can handle the values from -2147483648 to -2147483647 (=- (2
31
) - (2
31
- 1) during calculation. But,
the device can handle the values from 0 to 461269364 when carrying out square ($) calculation.
If the values goes beyond the values above during calculation or the calculation results became the values above,
then ERR (ERROR) signal is output and the calculation result becomes “0”. But, if the calculation results are
output to the external device via Serial or Ethernet, “0” is output.
Calculation Order
Calculations are performed in priority order as follows:
Higher -------------> Lower
(, ) @, $, #, & *, /, T, D +, -
Notice on Division
The decimal numbers are omitted after calculation. Omission of the numbers is performed in priority order of four
arithmetic operations. Incorporate a division into the end of the formula as much as possible.
Example:
Calculation 1: A = B / 2 *100
Calculation 2: A = B * 100/2
If B = 3, A will differ between the calculations above.
Calculation 1 A = 3 (= B) / 2 * 100 = 1 (the decimal number of 1.5 is omitted.) * 100 A = 100
Calculation 2 A = 3 (= B) * 100 / 2 A = 150
Error signal is output if the value is divided by 0.
If denominator is "0", the calculation result "0" is displayed on the screen and the error signal is output from the
parallel port. If the calculation result was referred to the Data Monitor table, "ER" will be displayed on the screen.
If the calculation result is output to the external device, "0" will be output.
Incorporating the calculation results into another formula
Numeric calculation is performed in the ascending order. Therefore, the number of the formula which you want to
incorporate must be lower than the number of the formula to which you want to incorporate.
Example:
Correct: CA01=GW01+GW02
CA02=CA01*100
Wrong: CA01=CA02 + 100
CA02=GW01+GW02
In the wrong case above, the data substituted for CA02 in the formula CA01 are the calculation result of
the previous inspection.