Siemens Milltronics BW500 Operating Lnstructions page 144

P638 External Totalizer Resolution
Note:
• If the resolution selected would cause the totalizer to lag behind the
count at 100% of design rate, the next possible resolution is
automatically entered.
• External Totalizer output frequency must not exceed 13.33 Hz at 150% of
design rate.
This parameter sets the resolution of the selected external totalizer.
Totalizers are:
P638-01, external totalizer 1 (T1), terminals 35/36
P638-02, external totalizer 2 (T2), terminals 38/39
Entry:
1 = 0.001 (one thousandth)
2 = 0.01 (one hundredth)
3 = 0.1 (one tenth)
f
4 = 1 (unit)
5 = 10 (x ten)
6 = 100 (x hundred)
7 = 1000 (x thousand)
P643 External Contact Closure
Sets the duration of the contact closure, in ms, for the external totalizer selected,
totalizers 1 and 2 (P643-01 or -02) (
Permissible values are in 10 ms increments from 0. The value is automatically calculated
upon entry of P1 (design rate) and P638 (totalizer 1 resolution, external) so that the
duration of contact closure allows the transistor switch response to track the total, up to
150% of the design rate. The value can be changed to suit specific contact closure
requirements, such as in the case of programmable logic controllers.
Note:
• If the duration selected causes the totalizer to lag behind the count rate,
the next possible duration is automatically entered.
• External Totalizer output frequency must not exceed 13.33 Hz at 150% of
design rate.
Page 138 Milltronics BW500 and BW500/L - OPERATING INSTRUCTIONS
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= 30)
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