IAI America XSEL-S - Manual (Page 59)

Chapter 3 Operation (Construction for Network)
53
IA Net
XSEL-R/S
2) Port Assignment Settings
No.
Parameter Name
(I/O parameters)
Initial Value
(Reference)
Input Range Remarks
1 I/O Port Allocation Type 1 0 to 1
0 : Fixed Allocation (recommended)
1 : Automatic Allocation
The priority in order for extension input
and output ports assignment at automatic
assignment is as shown below:
1) Network I/F Module 2
2) Extension I/O Unit
3) IA Net (for communication among
controllers)
Assignment is applied to extension input
and output ports.
Input Ports No.1000 to 3999
Output Port No.4000 to 6999
691
Extension Input Port Start
Number at IA Net Fixed
Assignment
-1 -1 to 3999
1000+(Multiples of 16)
(Setting is invalid if set to -1)
692
Extension Output Port Start
Number at IA Net Fixed
Assignment
-1 -1 to 6999
4000+(Multiples of 16)
(Setting is invalid if set to -1)
When 1 (Automatic Assignment) is set in I/O Parameter No.1, the extension input and output
ports are assigned from the smaller number in the order described below:
4) Number of used ports in Network I/F Module 2 (CC-Link, DeviceNet, etc.)
5) Number of used ports in the Extension I/O Unit
6) Number of used ports in IA Net (for I/O communication among controllers)
When 0 (fixed assignment) is set in I/O Parameter No.1, set the assignment start port number
for each of input and output to I/O Parameters No.691 and 692. Set to -1 (invalid) to the slots
not to be used.
Note It is recommended to set to 0 (Fixed Assignment) in I/O Parameter No. 1.
Caution 1) For output ports, every 64 points require to occupy one station each.
2) When using only the input ports, it is necessary to occupy one station no
matter of the number of slots.
3) The number of stations that can be occupied by one unit of XSEL controller on
the IA Net network is four at the maximum. When using together with
communication among controllers, be careful not to exceed four stations.
(Number of stations used for I/O communication among controllers + Number
of stations used for extension I/O units ” 4)
If the number of used stations exceeds four, “560: Number of IA Net Occupied
Station Exceeded Error” will be generated.