SMC Networks EX500 manual Address setting switch SW1, 2, Terminating resistance setting switch SW4

EX500 Serial System EX## - OME0008

6 -4 -1. Address setting switch ( SW1, 2, 3 )

These switches set node address. The setting is shown in the following figure.

The address per one segment can be set in 32 node in case of no Repeater used and is set a maximum of 126 node in case of a Repeater used.

ON

1 2

SW3

X100

X10

SW2SW1

X1

		SW3	SW2	SW1
	1	2
ON	N.C	1	0	0
OFF		0
			9	9

6 -4 -2. Terminating resistance setting switch ( SW4 )

This switch is to set the terminating resistance.	①resistance	② No	resistance	③ No	resistance
The setting is shown in three figures on right.
	ON OFF OFF	ON	OFF OFF	ON	OFF OFF
		State of SW4

6 -5. I/O memory map

The GW Unit can control 128 input / output points in total. Regardless of I/O points of the equipment, it always occupies each data memory area for 64 inputs and 64 outputs.

Once the address is assigned in the GW Unit, every port then corresponds to a specific “Word” respectively. So “Word (n)” always corresponds to COM A, “Word (n+1)” corresponds to COM B, and so on.

Ex.) n = 1

In case of the input data, the sensor signal data of the Input Manifold which was connected with the COM A port, occupies "Word1" of the I/O memory mapping.

If a sensor signal is stored in the "0 bit" of the Input Manifold, it becomes like the Figure below. In the same way, in the case of the output data, the contents displayed in "Word1" of the

I/O memory mapping is output by the COM A port.

・In case of corresponding with “ Word “

	Branch			Data ( 2 byte )
( m,n=0 - )		MSB			LSB		MSB			LSB
	connector
		15			8	7				0
Word ( n )	COM A		Byte (m+1)						Byte (m)		1
Word ( n+1 )	COM B
			Byte (m+3)					Byte (m+2)
Word ( n+2 )	COM C
			Byte (m+5)					Byte (m+4)
Word ( n+3 )	COM D
			Byte (m+7)					Byte (m+6)
:	:
:	:
						- 27 -