MR8740、MR8741_user_manual_eng_20191016H.pdf - 第350页

16.2 External I/O (MR8741 Only) 338 Signals can be output that indicate the MR8741 ju dgment state. 1. Connect the G O/OUT1, NG/OUT2, and GND termin als to the de vice(s) to be controlled by single wires. See: "16.1…

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16.2 External I/O (MR8741 Only)
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Chapter 16 External Control (MR8741 Only)
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External control signals can be applied to start and stop measurement, and to save data. The fac-
tory-default settings are to [START], [STOP], and [SAVE].
1. Connect the cables for the corresponding external input signals to START/ IN1,
STOP/IN2, SAVE/IN3, and GND terminals.
See: "16.1 Connecting External Control Terminals (MR8741 Only)" (p.336)
2. On the SYSTEM screen, open the [Environment] sheet and move the cursor to
the [START/EXT.IN1], [STOP/EXT.IN2], or [SAVE/EXT.IN3] item.
3. Select the operation performed by the instrument in response to external signal input.
Select
4. Short circuit the terminal and GND, or input a HIGH level (3.0 to 5.0 V) or LOW
level (0 to 0.8 V) pulse wave or rectangular wave to the terminal.
Control with the LOW level of the input waveform.
16.2 External I/O (MR8741 Only)
16.2.1 External Input (START/IN1) (STOP/IN2) (SAVE/IN3)
Signal Input Procedure
Start Start measurement. (Is not affected by [Start Action] (p.311))
Stop
Stop measurement. (Operations after measurement, such as numerical calcula-
tions and automatic saving will be carried out)
Start/Stop
Start measurement on LOW level, and stop measurement on HIGH level.
Abort
Stop measurement immediately. (Operations after measurement, such as nu-
merical calculations and automatic saving will not be carried out)
Save
Save the data according to the saving conditions specified on the [File Save]
sheet of the System screen. (Not valid during Selective Saving (p.93))
RUN/STOP
Runs/stops waveform output. (RUN at LOW level, STOP at HIGH level).
PAUSE
Stops waveform output temporarily.
• For STOP operation, follow [Stop Action] (p.311).
• External input is not available when the HELP screen or a dialog window is
being displayed.
Voltage range HIGH level: 3.0 to 5.0 V , LOW level: 0 to 0.8 V
Pulse width HIGH level: 20 ms or greater, LOW level: 30 ms or greater
Maximum input
voltage
-0.5 to 7 V
START/IN1
STOP/IN2
SAVE/IN3
470
GND
2200 pF
5 V
3.3 k
HIGH
3.0 to 5.0 V
LOW
0 to 0.8 V
30 ms or greater
20 ms or
greater
5 V
16.2 External I/O (MR8741 Only)
338
Signals can be output that indicate the MR8741 judgment state.
1. Connect the GO/OUT1, NG/OUT2, and GND terminals to the device(s) to be
controlled by single wires.
See: "16.1 Connecting External Control Terminals (MR8741 Only)" (p.336)
2. On the SYSTEM screen, open the [Environment] sheet and move the cursor to
the [GO/EXT.OUT1] or [NG/EXT.OUT2] item.
3. Select the conditions under which the instrument outputs a signal.
(when the [GO/EXT OUT1] item is selected)
Select
GO evaluation result output (low level output) is held until the next measurement starts.
(when the [NG/EXT OUT2] item is selected)
Select
NG evaluation result output (low level output) is held until the next measurement starts.
16.2.2 External Output (GO/OUT1) (NG/OUT2)
Signal Output Procedure
Measure A LOW signal is output when the judgment result is GO (pass).
Waveform
Evaluation
A LOW signal is output when the waveform evaluation result is GO (pass).
Value Evalua-
tion or Wave-
form
Evaluation
A LOW signal is output when either the value calculation or waveform calculation
evaluation result is GO (pass).
Value Evalua-
tion and Wave-
form
Evaluation
A LOW signal is output when both the value calculation and waveform evaluation
result are GO (pass).
Error
Output a LOW level signal when an error occurs.
Busy
A LOW signal is output when external start operation is disabled, such as during
startup and saving.
Trigger
Output a LOW level signal while instrument is waiting for a trigger.
Measure
A LOW signal is output when the judgment result is NG (fail).
Waveform
Evaluation
A LOW signal is output when the waveform evaluation result is NG (fail).
Value Evalua-
tion or Wave-
form
Evaluation
A LOW signal is output when either the value calculation or waveform calculation
evaluation result is NG (fail).
Value Evalua-
tion and Wave-
form
Evaluation
A LOW signal is output when both the value calculation and waveform evaluation
result are NG (fail).
Error
Output a LOW level signal when an error occurs.
Busy
A LOW signal is output during measurement and saving, and when it’s finished, a
HIGH signal is output.
Trigger
Output a LOW level signal while instrument is waiting for a trigger.
Calibration
1 kHz output for calibrating Model 9665 10:1 Probe and the 9666 100:1 Probe.
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Chapter 16 External Control (MR8741 Only)
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4. The signal for the specified state is output.
Output signal Open drain output (with voltage output) active LOW
Output voltage
range
HIGH level: 4.0 to 5.0 V, LOW level: 0 to 0.5 V
(current value:15 mA)
Maximum input
voltage
50 VDC, 50 mA, 200 mW
HIGH
4 to 5.0 V
LOW
0 to 0.5 V
Output period
HIGH
4 to 5.0 V
LOW
0 to 0.5 V
1 ms
500 s 500 s
Probe Calibration Active
Probe Calibration Inactive
GND
GO/OUT1
NG/OUT2
10 k
10 k
5 V