Rockwell Automation 57C445 AutoMax PC Link Interface Module - Manual (Page 42)

D3Ć2
Table 3 - RERIO Memory Organization
Address Name Set By Description
0000 MODULEąID RERIO
Module identification word. Set by REĆ
RIO to 15A1H. Host may use to verify
RERIO software is present.
0400-1FFF DATAąTABLE BOTH
Remote I/O data table. Divided into
Drops, Slots and Registers.
2000H RECONFIG BOTH
Reconfigure byte. Host sets to 0FFH to
cause card to reĆconfigure using new
information.
2001-2007 VIRąENA HOST
Virtual drop enable table. Configuration
packet must be present for all drops enĆ
abled in this table. RERIO reads these
values only during
reconfiguration.
2009-200F PASVąENA HOST
Passive drop monitor enable table. ConĆ
figuration packet must be present for all
drops enabled in this table. RERIO
reads these values only during reconfiĆ
guration.
2011-2017 VIRąACT RERIO
Virtual drop active table. Set by RERIO
to indicate that the given virtual rack is
being updated by the Master.
2020 ACTąMAS RERIO
Set to 0FFH by RERIO whenever an acĆ
tive Master is connected, even if no
drops are enabled.
2021-2027 DROPąACT RERIO
Drop active table. Set by RERIO to indiĆ
cate that the given rack (virtual or real) is
being updated by the Master.
2100H-27F
F
CNFąBUF BOTH
Drop configuration buffers. One 256
byte buffer for each drop.
MODULE_ID is a single register which is set to 15A1H by the RERIO
software at install time. The host may read this register to make sure
the RERIO software is present.
The data table (DATA_TABLE) is divided into 7 drops (1-7). Each
drop consists of 16 slots. Each slot consists of 32 registers. This
organization matches the standard Remote I/O configurations with
real remote racks and Remote Heads. Drop/slot/register locations
can be calculated using the following formula:
Register_Location = (Drop*1024) + (slot*64) + (Register*2)
For example to access Drop 6, slot 3, register 7, the user would
read/write to:
offset
= (6*1024)+(3*64)+(7*2)
= 6144+192+14
= 6350 decimal or 0x18CE
RECONFIG is set to OFFH by the host to indicate that the module
should reĆconfigure itself using the current data in the virtual drop
enable table (VIR_ENA), the passive drop monitor enable table
(PASV_ENA), and the drop configuration buffers (CNF_BUF). If the
PC Link module detects a nonĆzero value in this location, it will stop
all virtual drops and stop all updating of passive drop data. The PC