Yaskawa 120 Series I/O Modules - Manual (Page 116)

3 Digital I/O Specifications
3.4.2 32-point Input Modules
3-86
Fig. 3.3 Allocation of Input Relays
When allocating input relays, the MEMOSOFT is set by default to “MSB.”
When input relay allocation is set to “MSB,” the leading reference number is allocated
to the smallest input number (input 1) on the Input Module.
(2) When two input registers beginning with input register 300001 are allocated,
the bit order can be set to either “MSB” or “LSB,” as described in the following
table and shown in the illustration below it. Allocation is performed in units of 16
input points.
Refer to Fig. 3.4 Allocation of Input Registers for details.
Terminal number
Input signals
MSB Setting LSB Setting
Input 1
Input 2
Input 3
Input 14
Input 15
Input 16
Input 17
Input 18
Input 19
Input 30
Input 31
Input 32
IMPORTANT
Input Register LSB Setting Bit 15 (MSB) of the leading input reference number (300001) is
allocated to the smallest input number of the first 16 input points
(input 1) on the Input Module. Bit 15 (MSB) of the second input
reference number (300002) is allocated to the smallest input num-
ber of the second 16 input points (input 17) on the Input Module.
Input Register MSB Setting Bit 15 (MSB) of the leading input reference number (300001) is
allocated to the largest input number of the first 16 input points
(input 16) on the Input Module. Bit 15 (MSB) of the second input
reference number (300002) is allocated to the largest input num-
ber of the second 16 input points (input 32) on the Input Module.