Sharp JW-21MN manual Reason

(3)Notes

When adding a communication station, follow the items below.

No.	Item	Reason
1	Branch from the trunk cable.	Another branch line from a branch line may not give
		appropriate communication by reflection wave.
2	DonÕt use the same station number	The use of the same station number twice may cause
	twice.	communication errors.
3	Check the termination resistance	When the newly added station becomes a termination of
	switch.	the circuit, change the setting of the LT switch.
4	Provide extra length for the	Have enough cable length in order to provide easy wiring.
	expansion cable.
5	Do not exceed the 1 km limit for total	Longer wiring may cause communication error by signal
	length of the cable.	attenuation.
6	Change the layout drawing for	Maintain the added work data for future maintenance use.
	installation.
	Do not overlap with any PCÕs	When the communication area or the flag area of the
7		added station overlaps with other addresses in use,
	communication area.
		communication errors may occur.
	Set the parameter memory of the	Without setting the parameter memory of the master
8	master station and that of the newly	station and that of the slave station, the added station
	added station.	cannot communicate.

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