IAI America XSEL-S - Manual (Page 62)

Chapter 3 Operation (Construction for Network)
56
IA Net
XSEL-R/S
3.3 Operation
Caution 1) XSEL controllers check the links of all the stations set in I/O Parameters
No.605 and 606 at the startup, and will generate “211/552: IA Net Link Error”
in case any of the stations was not confirmed. Therefore, it is recommended
to have the power supplied to all the units connected to IA Net is turned ON at
the same time.
* The time to wait for the link establishment can be changed in Bits 24 to 34:
Timeout duration (sec) for link waiting at IA Net initializing in I/O Parameter
No.608 “IA Net Attribute 1”. (Initial setting = 15sec)
2) If the software reset is conducted or the power is turned OFF on a station in
the link with I/O Parameter No.607 “IA Net Error Monitor” set to 1 (Valid),
controllers on other stations will issue “211/552: IA Net Link Error”.
To avoid the link error at the startup, it is suggested to set IA Net Error Monitor
to 0 (Invalid) temporarily, or reboot the power to all the connected stations at
the same time.
3) The shared data of a station with an error in IA Net network is unreliable.
3.3.1 Example for Extension I/O Unit Connection
Connect an extension I/O unit to an XSEL controller through IA Net.
Shown below is an example for parameter settings assuming an I/O port with 32 points of output
and 64 point of input (occupies two slots) is used.
Listed below is the usage condition.
x Usage Conditioin
Item XSEL
Extension I/O
Units
Remarks
Top Station No. 0 4
XSEL occupies 2 stations,
Extension I/O unit occupies 4 stations
Extension I/O Unit No. 1
Number of Output Points 0 32
Number of Input Points 0 64
Assign to the I/O boards in Slot 0 and 1
Used Extension Input Port Start No. 1000 Use in fixed assignment
Used Extension Output Port Start
No.
4000 Use in fixed assignment
IA Net Connection
Extension I/O Unit (Unit No.0)
Slot 0 : Input 32 Points, Output 16 Points
Slot 1 : Input 32 Points, Output 16 Points
XSEL