SMC Networks EX600-SDN Series Operation Manual page 52

Digital input unit parameters
No. Parameter
Short circuit
1
detection
Open circuit
detection
2 (only available
for open circuit
detection unit)
Inrush current
3
filter
Input filtering
4
time
Input extension
5
time
Channel
6 ON/OFF
counter
Digital output unit parameters
Parameter
No
Name
Short circuit
1
detection
Restart after
2
short circuit
Open circuit
3
detection
Output setting
during
4
communication
fault
Output setting
during
5
communication
idle
Channel On/Off
6
counter
If a short circuit or over current occurs at the sensor power supply a diagnostic
error will be generated.
If an open circuit is detected at the input sensor a diagnostic error will be
generated. There is a setting available for each channel.
Please note the following:
When a 2-wire type sensor is used, during OFF state, a leakage current of max.
0.5 mA will not be detected. A sensor with a leakage current of min. 0.5 mA (in
the OFF state) must be used.
When a 3-wire type sensor is used, if the sensor has a current consumption of
max. 0.5 mA, an open circuit may not be detected.
When input equipment with high capacitance is connected, when power is
applied, over current will be detected.
If the inrush current filter is active, during the first 100 ms after power is applied,
over current will not be detected.
A change of signal faster than the input filtering time will be disregarded.
An input signal will be extended to the time set by this parameter. If the signal is
longer than the setting, then this parameter setting will be disregarded.
The number of times the input is ON/OFF is recorded for each channel. There is a
set value for each channel and a diagnostic error is generated when the set value
is reached.
The counter value is recorded every hour.
If the power supply for control and input is turned OFF, data that has not been
recorded will be cleared.
Contents
If a short circuit or over current occurs at the output load, a diagnostic error will be
generated.
The short circuit detection diagnostic can be set to automatic or manual reset.
If an open circuit is detected when the output is in the OFF state, a diagnostic error
will be generated. This setting can be made for each channel.
When there is a communication fault, each channel's output can be set to Hold,
Clear or Force ON setting. This function will only be activated when the Hold/Clear
setting method at the system configuration is set to Handheld.
When communication is idle, each channel's output can be set to Hold, Clear or
Force ON setting. This function will only be activated when the Hold/Clear setting
method at the system configuration is set to Handheld.
The number of times the output is ON/OFF is recorded for each channel. There is a
set value for each channel and a diagnostic error is generated when the set value is
reached.
The counter value is recorded every hour.
If the power supply for control and input is turned OFF, data that has not been
recorded will be cleared.
Contents
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No.EX##-OML0007