Rockwell Automation 57C445 AutoMax PC Link Interface Module - Manual (Page 37)

D2Ć2
Address Name SetBy Description
000Ć1BFF DATAąTABLE BOTH Drop Register Image Table
1F00Ć1F37 DATAąCHNGE BOTH
Data Change Table Ć one byte
for each drop. A nonĆzero value
indicates that data for the specifĆ
ic drop has changed.
1F38 STATąCHNGE BOTH
Status Change Ć Set to 0xFF any
time active drop status changes.
1F39 GLOBąCHNGE BOTH
Global Change Ć Set to 0xFF
any time STATąCHNGE is set
to 0xFF, or DATAąCHNGE is set
to 0xFF, for drops which are enĆ
abled in the
ENąGLOBąCHNGE table.
1F3A ENąGLOBąINT HOST Enable Global Change Interrupt
1F40Ć1F77 ENąGLOBąCHNG HOST
Enable Global Change Drop
Table Ć a nonĆzero value for a
particular drop causes
GLOBąCHNGE to be set if
DATAąCHNGE for the given
drop is set.
2.3 Drop Register Image Table (DATA_TABLE)
The Drop Register Image table is divided into 56 drops. Each drop
consists of 128 bytes or 64 registers. Drop register locations can be
calculated using the following formula:
Register_Location = (Drop*128) + (Register*2)
For example, to access Drop 6 register 31, the user would read/write
to:
offset = (6*128)+(31*2)
= 768+62
= 830 decimal or 0x33E