Yokogawa PC-Based MX100 - Manual (Page 77)

2-48
SM MX100-01E
2.10.6 Pulse Duty Accuracy
Wire the units in the same manner as in the “Pulse Interval Accuracy Test,” enter all
settings (PWM output settings), then confirm that the criteria are met.
The wiring diagram for the pulse interval accuracy test shows an example of wiring CH5.
Actual measurment should be performed on all channels.
Use a counter trigger level of 2.5 V.
PWM Outupt Settings
<MX100 Settings>
Connect to the PC, then enter the following settings using the MX100 standard software.
When using the MX100/DARWIN API for settings, enter settings that are equivalent to
the following.
Item Setting Remarks
Enable/disable Enabled
Action User output
Span Need not specify
Output upon power ON Preset value Sets the output at power ON as a
preset value.
Output upon error Preset value Sets the output upon error as a
preset value.
Preset value 0.000 % Sets 0% duty.
Resolution Depends on the test
Pulse interval Depends on the test
Other settings Not required
<MW100 Settings>
Referring to the MW100 user’s manual for browser operation, or by using communication
commands, set up the MW100 or equivalent according to the table below.
Item Setting Remarks
Output type PWM
Output method COM Command output
Output range Depends on the test
Span Need not specify
Pulse interval Depends on the test
Preset value 0.000 % Sets 0% duty.
Reference channel Not required
Output Operation Setting
Item Setting
Power ON PRESET
Error occurence PRESET
Criteria (for the MX100 and MW100)
If entering the pulse duty and PWM settings according to the table below, confirm that
the output pulse interval of the specified channels satisfies the criteria.
(Set for each channel. Channels not under test output 0%).
Pulse interval PWM Output Setting Criteria
1 ms 1.000 % Duty: 1 % ±0.15 % (Pulse interval: 10s ±1.5 s)
50.000 % Duty: 50 % ±0.15 % (Pulse interval: 500 s ±1.55s)
99.000 % Duty: 99 % ±0.15 % (Pulse interval: 990 s ±1.59s)
5 ms (1 ms ×5) 50.000 % Duty: 50 % ±0.03 % (Pulse interval: 2.5 ms ± 1.75s)
10 ms (10 ms ×10) 1.000 % Duty: 1 % ±0.015 % (Pulse interval: 0.1 ms ±1.51 s)
50.000 % Duty: 50 % ±0.015 % (Pulse interval: 5 ms ±1.9 s)
99.000 % Duty: 99 % ±0.015 % (Pulse interval: 9.9 ms ±1.9 s)
100 ms (10 ms ×10) 50.000 % Duty: 50 % ±0.003 %
2.10 8-CH, Medium-Speed PWM Output Module