b3
b4
b5
b7
b6
b2
b1
b0
b11
b12
b13
b15
b14
b10
b9
b8
B281XB-02U-CC20, B281XB-02US-CC20
OUT0
n
IN0
B281SB-02U-CC20, B281SB-02US-CC20
B281PB-02U-CC20, B281PB-02US-CC20
n+1
OUT1
n
OUT0
n+1
IN1
n
IN0
-B281*B02U*CC20 10/17-
0
1
NPN
B281SB-02U-CC20
B281PB-02U-CC20
B281XB-02U-CC20
○
－
○
○
－
○
－
IN
0VL
24VL
PNP
B281SB-02US-CC20
B281PB-02US-CC20
B281XB-02US-CC20
－
－
－
×
×
×
×
－
○
○
○
－
－
－
－
○
－
○
○
－
○
－
IN
0VL
24VL
○
○
○
○
○
－
－
－
○
○
－
－
○
○
－
－
－
0VL
24VL
○
○
－
－
－
○
－
○
－
－
○
－
－
－
－
0VL-24VL 0VL-OUT OUT-24VL
○
○
○
○
○
－
－
－
○
○
－
OUT
Parameter setting
I/O disconnection detecting current
■
Disconnection monitoring function setting
[Equipment parameter 1]
■
Operation modes available with each model
Model
Detection of I/O disconnection
2-wire type
sensor
3-wire type
sensor
Load
Power
supply
Load
Short-circuit detection
I/O disconnection detection and short-circuit detection are disabled.
I/O disconnection detection and short-circuit detection are enabled.
Variable
Description
Factory setting: 0
This parameter is used to specify whether the I/O cable disconnection detecting function is enabled or disabled.
Input: When sensor’s circuit current is 0.35mA or less, it is judged as disconnection.
Output: When load current in output-ON status is 2mA or less, it is judged as disconnection.
Address
offset
Bit output
Address
offset
Bit input
Address
offset
Bit input
Bit output
[Data Configuration]
*
n = Bit address number assigned to this unit
*
1 This can be used on the master unit having the status detail area. For details, refer to the manual for the master unit.
Status
details
Status detail area of the master unit
b0: Slave unit voltage drop (DP-DN-side voltage drop)
b2: I/O disconnection
b3: I/O short-circuit
■
Status details
The contents of an alarm detected with this unit can be checked with the “status detail area
*
1
”
on the master unit.
A bit corresponding to the status detail area turns ON depending on the contents of the alarm.
