KEYENCE LS-3100/3100W Series - Manual (Page 82)

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CHAPTER 7
H
INTS ON
C
ORRECT
U
SE
General • When noise interference may occur in the surroundings, connect the LS
controller to an external device (computer, etc.) using an electromagnetic-
interference protection cable(s). Be sure to turn OFF the power of the LS
controller before connecting it to an external device.
GP-IB Interface I/O
• Supply power to the computer or other device(s) before supplying power
to the LS controller. If power is supplied to the LS controller first, it may
malfunction due to noise occurring when another device starts up.
• Up to 15 devices can be interconnected using the GP-IB bus.
• The total cable length for connecting the devices should be 20 m or
shorter, provided that it does not exceed "2 m x number of devices". Also,
the length of each cable should not exceed 4 m. When 3 devices are
connected, for example, the maximum total cable length is 6 m, and when
4 devices are connected, it is 8 m. (See the figure below.)
To make long-distance transmission of data, use an appropriate signal
transmission system instead of the GP-IB bus.
LS
4m
LS
2m
LS LS
2m 4m
LS
2m
Connecting 3 devices
Connecting 4 devices
When using the GP-IB, set the address and delimiter applicable to the
program to be executed or device(s) to be connected.
When the shape or glossiness of targets varies, measurement error may
occur. In such a case, place a target of known dimension in the measuring
area and calibrate the LS controller using CAL. (Two targets of different size
are required.) Targets
Measuring Conditions When the target is vibrating, measured values may vary significantly. In such
a case, set the number of measurements for averaging to a larger number to
ensure highly accurate measurement.
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