Yaskawa 545 PLC - Manual (Page 7)

3 OPERATION
6 Programming the PAC Blocks
4/12/94
3. The PLC gateway can only access modules in slots 1 to 16.
If you define modules in other bases and slots, you can not
access them through the PLC gateway.
4. Modules can only be of types 16Y (Discrete Output), 16X
(Discrete Input), 8WY (8 Channel Register Output), or 8WX
(8 Channel Register Input).
The PLC gateway receives messages from the MicroTrac LAN. Each of these
messages contains a channel number. This channel number specifies which
Modicon module the message is addressing. The channel number can range
from 011 to 249. The least significant digit is used to specify the slot number,
and the 2 most significant digits specify the drop number. The rack is always
assumed to be 2. When dealing with analog data, there is always a sub
channel field that specifies the word within th analog module the message is
addressing. This can range from 1 to 8. The discrete messages have a mask
field which specifies the bits the message is addressing.
Table 5. Module Types
PAC TEXAS INSTRUMENTS PLC MODULE
BLOCK TYPE DESCRIPTION
LOGO 16X 16 point Discrete Input Module
NUMO 8WX 8 channel Register Input Module
LOGI 16Y 16 point Discrete Output Module
NUMI 8WY 8 channel Register Output Module
Programming
the PAC Blocks
Table 6. Channel Number Designations
LAN Node LAN Channel LAN Sub Channel
Number Number NUMBER
200 - XX X - XX
TI TI TI
Slot No. Base No. Bit No.
Range = Range = Range = 01 to 16 for
01 to 16 01 to 09 Logic I/O
Range = 01 to 08 for
Numeric I/O
RD 3056-10