Omron C200HW-SRM21-V1 - 08-2007 - Page 138

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CJ1W-SRM21 Master Unit for CJ-series PLCs Section 4-3
Example: When a 16-point Output Slave set as node number 5, the areas for
Output Slaves 4 and 5 are used. Other Output Slaves cannot use the area
allocated for Output Slave 4.
Slave with Mixed I/O (8 Inputs and 8 Outputs)
Slaves that have both outputs and inputs are also assigned a single node
number, so the same node number is used for both outputs and inputs.
Example: When a Slave with 8 inputs and 8 outputs set as node number 2,
the area for node number 2 outputs and inputs is used.
Slave with 4 Outputs or 4 Inputs
The Slave is treated as one node number for output or input. The Slave uses
the rightmost 4 bits only, however, of the area allocated for one node number.
(The leftmost 4 bits cannot be used by another Slave.)
• When an odd node number has been set:
Bits 8 to 11 are used and bits 12 to 15 are not used.
• When an even node number has been set:
Bits 0 to 3 are used and bits 4 to 7 are not used.
Example: When a Slave with 4 inputs is set as node number 7, the Slave is
allocated the rightmost 4 bits (bits 8 to 11) in the area assigned for input node
number 7.
Slave with Mixed I/O (4 Outputs and 4 Inputs)
Slaves that have both outputs and inputs are also assigned a single node
number, so the same node number is used for both outputs and inputs. The
Slave uses the rightmost 4 bits only, however, of the area allocated for one
node number. (The leftmost 4 bits cannot be used by another Slave.)
• When an odd node number has been set:
Bits 8 to 11 are used and bits 12 to 15 are not used.
123456789101112131415 0
0
0
Bits
First word + 2
Bit 7
Output Slave 4
Bit 7
Output Slave 5
Set to node No. 5
16-point Output Slave
16 outputs
0 0
123456789101112131415 0
0
0
Bits
First word + 1
Bit 7
Output Slave 2
Bit 7
Output Slave 3
Bit 7
Input Slave 2
Bit 7
Input Slave 3
First word + 5
(IN0 to IN7 and OUT0 to OUT7)
First word + 9
(IN0 to IN15 and OUT0 to OUT15)
16-input/output Slave
8 outputs
8 inputs
Set to node number 2
0 0
123456789101112131415 0
Bits
Reserved
Input Slave 7
Bit 3 Bit 7
Input Slave 6
First word + 7
(IN0 to IN7 and OUT0 to OUT7)
First word + 11
(IN0 to IN15 and OUT0 to OUT15)
Set to node number 7.
4-point input Slave
4 inputs