IAI America E-Con - Manual (Page 92)

7.
ASEL, PSEL, SSEL
84
6.4 I/O Port Numbers and ProfiBus-DP Address Assignments
ASEL, PSEL and SSEL controllers operate in the program mode and positioner mode, but the principles of
assignment are the same with both modes. To be specific, I/O port numbers are assigned in units of 16 points
starting from the channel address in the PLC buffer memory corresponding to the specified node address. Here,
the PLC buffer memory bits are sequentially assigned to the I/O port numbers, starting from the smallest port
number and lowest memory bits.
(1) Basic example
The correlation diagram shown below assumes the following settings of I/O parameters:
No. 16 = 0 (Initial input port number)
No. 17 = 300 (Initial output port number)
No. 14 = No.15 = 16 (Numbers of input and output ports)
No. 226 = nn
(Node address)
(Note) NN and MM are PLC channel addresses corresponding to node address nn.
Since node addresses (nn, nn+1, nn+2, and so on) are occupied according to the numbers of I/O points
used, pay attention to duplicate node address settings.
Input port number
(bit address)
PLC output buffer memory
bit position Channel
address
PLC input buffer memory
bit position
Output port number
(bit address)
7.4