SMC Networks EX500 - Manual (Page 28)

EX500 Serial System EX## - OME0008
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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.
6 -4 -2. Terminating resistance setting switch ( SW4 )
This switch is to set the terminating resistance.
The setting is shown in three figures on right.
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 “
SW2
X10
SW1
X1
SW3
1 2
SW2 SW1
ON 1
OFF
N.C
0
0
|
9
0
|
9
SW3
ON
1 2
X100
State of SW4
① resistance
ON OFF OFF
③ No resistance
ON OFF OFF
② No resistance
ON OFF OFF
Data ( 2 byte )
MSB LSB MSB LSB ( m,n=0 - )
Branch
connector
15 8 7 0
Word ( n ) COM A 1
Word ( n+1 ) COM B
Word ( n+2 ) COM C
Word ( n+3 ) COM D
:
: :
:
Byte (m+1) Byte (m)
Byte (m+3) Byte (m+2)
Byte (m+5) Byte (m+4)
Byte (m+7) Byte (m+6)