ABB CoriolisMaster FCM2000, Инструкция по эксплуатации

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D184B111U02 FCM2000 51
6.6.13.3 Pulse Width
The pulse width can be entered between 0.1ms and 2000 ms. The converter checks the entry, and reduces
it if necessary, to assure that the pulse width does exceed one half of the period at the maximum output
frequency, which is calculated from the pulse factor and QmMax
Examples:
Example 1: A new pulse width is entered
Settings: QmMax = 24 kg/min = 0.4 kg/s
totalizer unit kg
pulse factor = 100 pulses /kg
Entry: pulse width 10 ms
→
0.4 kg/s * 100 pulses /kg = 40 pulses / s
→
frequency = 40 Hz
→
period = 25 ms
→
maximum pulse width = period /2 = 12.5 ms
→
Result: entered pulse width of 10 ms is acceptable.
Example 2: A new pulse factor is entered
Settings: QmMax = 6 kg/min = 0.1 kg/s = 100 g/s
totalizer unit g
pulse width 10 ms
Entry: pulse factor 60 pulses /g
→
100g/s * 60 pulses/g = 6000 pulses / s
→
frequency = 6000 Hz
→
too high!
→
The converter automatically reduces the pulse factor to 50 pulses/g which
corresponds to a period to 0.2ms (5kHz)
→
maximum pulse width = period /2 = 0.1 ms
→
Result: The entered pulse factor and pulse width were both automatically decreased.
6.6.14 Submenu Current Output 1
Pulse width
10.000 ms
Submenu
Current output 1
6 Converter