Anywire ASLINKER BL2LN87SB-02DS-CC20 System Produkthandbuch - Seite 8
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Seite drucken[Detection of Sensor Cable Disconnection and Short-circuit]
[Disconnection monitoring function]
① Power supply line disconnection monitoring function
3-wire type sensor: Applied to 24VL line (A) and 0VL line (C)
2-wire type sensor: Applied to IN line (B) and 0VL line (C) (NPN)
Applied to 24VL line (A) and IN line (B) (PNP)
② Signal line disconnection monitoring function
3-wire type sensor: Applied to IN line (B) and 0VL line (C)
2-wire type sensor: Applied to IN line (B) and 0VL line (C) (NPN)
Applied to 24VL line (A) and IN line (B) (PNP)
<Operation during disconnection>
① The power supply line disconnection monitoring function works for IN0 and IN1 individually.
No differentiate between 24VL line (A) disconnection and of 0VL line (C) disconnection.
② The signal line disconnection monitoring function works for IN0 and IN1 individually.
NPN type: No differentiation between IN line (B) disconnection and 0VL line (C) disconnection
PNP type: No differentiation between 24VL line (A) disconnection and IN line (B) disconnection
*
When 0VL line disconnection occurs with NPN type sensor, or when 24VL line disconnection occurs with PNP type sensor, it is
possible that both power supply line disconnection and signal line disconnection are brought into detection status.
At occurrence of disconnection, it is indicated with the LED on the unit, equipment parameter and alarm bit
<Operation during restoration>
① Power supply line disconnection error will be automatically reset by eliminating the cause of disconnection.
② Signal line disconnection error will be retained even after the cause of disconnection is eliminated.
To reset this error, it is necessary that the reset command should be written with the relevant parameter.
Note: Even while the signal line disconnection error is retained, signal transmission is enabled.
！ Precautions for Use
[Short-circuit monitoring function]
③ Power supply line short-circuit monitoring function
This function detects short-circuit between 24VL line (A) and 0VL line (C).
<Operation at occurrence of short-circuit>
When these lines are short-circuited, all data are turned OFF. Short-circuit is indicated with the LED on the unit, and the
status detail area.
<Operation during restoration>
For operation to eliminate the cause of short-circuit, manual restoration or automatic restoration can be selected
depending on the parameter setting.
While the short-circuit error is activated (retained), signal transmission and power supply to sensors are disabled.
！ Precautions for Use
ASLINKER unit
IN0 input/disconnection
LINK
indication
IN1 input/disconnection
ALM
indication
- Do not connect an analog output sensor (4-20mA, 1-5V, etc.). Otherwise, a fault occurs
with the analog sensor.
- The cable length between this unit and a sensor should be 5m max.
- Transmission line 0V and I/O line 0VL must not be used in common. Otherwise, the
disconnection detecting function does not work.
- To use a mechanical contact (such as a switch), disable the monitoring function.
- This function is intended to detect disconnection of 24V, OUT and 0V lines of
general-purpose sensors, not to detect a fault of sensors.
- Transmission line 24V and I/O line 24VL must not be used in common. Otherwise,
the short-circuit detecting function does not work.
-BL2LN87SB02D*CC20 8/20-
Conditions of
target sensor
*
For information on sensors proven to be compatible with the
disconnection detecting function, please access our website.
http://www.anywire.jp
24V
A
24VL
IN0
IN
0VL (Current monitoring)
24VL
IN1
IN
0VL (Current monitoring)
*
1 It depends on lot No. whether alarm bit settings are enabled or not.
[2-wire type sensor ]
- Applied to ON/OFF sensor with 0.35mA or
more leak current
[3-wire type sensor]
- Applied to ON/OFF sensor incorporating
Zener diode output protection (breakdown
voltage: 47V or less)
3-wire type sensor
OUT
0V
B
C
B
OUT
2-wire type sensor
0V
C
*
The gure shows an
example of NPN type.
*
1
.