10
In case of main cable disconnection (system loop wired)
Due to the signal main cable loop wiring, the data of all the
addresses continues to be transmitted correctly if there is
a main cable disconnection at one location. (If the main
cable is disconnected at two locations, the data of the ad-
dresses between the disconnected locations stops being
transmitted.)
If the power supply is switched off once, and then switched
on again, the smallest disconnected unit address is dis-
played.
12. CABLE DISCONNECTION DETECTION
SL-GU1-D monitors the S-LINK system side signal transmission line, and in case cable discon-
nection, or a fault in an S-LINK unit, occurs, the address of the faulty unit is displayed in hexa-
decimal form.
However, in case of a multi-channel S-LINK-
dress is displayed.
If a fault occurs at several S-LINK units, the smallest address of the faulty
S-LINK units is displayed in the address display and the decimal points light
up simultaneously.
SL-GU1-D can monitor the following faults:
Decimal points lights up
Monitoring by
SL-GU1-D
Signal transmission
line disconnection
S-LINK unit falut (valid only for devices with mark)
Main cable disconnection
Branch cable disconnection (valid only for devices with mark)
Output A
Cable disconnection
10 20 30 40
80 70 60 50
Output B
<Main cable disconnection>
(Display on re-supply of power)
50 (hexadecimal) = 80 (decimal)
Output A
10 20 30 40
80 70 60 50
Output B
Cable disconnection
<Branch cable disconnection>
32 (hexadecimal) = 50 (decimal)
Note: In case loop wiring is not done, the smallest disconnected unit address is displayed immediately upon
cable disconnection.
In case of branch cable disconnection (valid only for devices with mark)
The address of the unit on the disconnected branch cable
is displayed.
The data of all addresses, except that of the unit on the
disconnected branch cable, continues to be transmitted.
However, the transmission delay time increases.
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