SMC Networks EX500 - Manual (Page 25)

EX500 Serial System EX## - OME0008
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5 -4 -1. Address setting switch ( SW1, 2 )
These switches set node address. The setting is shown in Table 1.
5 -4 -2. Data rate setting switch ( SW3 )
This switch set data rate. The setting is shown in Table 2.
The factory default address and data rate are 63 and 125 k bit / sec. respectively.
5 -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.
Read carefully the user manual of PLC which is used as a master.
The method of PLC setup, reading from or writing to memory differ from one PLC manufacturer to another.
SW1 SW2
X10 X1
SW1 SW2 NODE ADDRESS
0 0 0
0 1 1
0 2 2
| |
6 3 63
6 4
| PGM
9 9
SW3
SW3 DATA RATE
0 125 k bit / sec.
1 250 k bit / sec.
2 500 k bit / sec.
3
| PGM
9
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)
！ ！ ！ ！ CAUTION
When PGM mode is chosen, the address
and data rate are set through network.
Table 1 Table 2