Automation Direct D2-DCM, User Manual

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B–8
RLL Communications Programs
Data Communications Module, 2nd Edition, 2/03
D3–330 / D3–340 CPUs
To get ...
TMR/CNT Current Values use...
TMR / CNT Status Bits
use...
Data Registers
use...
R600 V0 CT600 GY600
1
R401, R400
2
V100
R601 V1 CT601 GY601
1
R403, R402
2
V101
— — — — — — — — — — — — — — — — — —
R677 V77 CT677 GY677
1
R777, R776
2
V237
To get ... g
I/O Points use... Control Relays use... Shift Registers use...
IO 000 GY0
1
CR160 GY160
1
SR400 GY400
IO 001 GY1
1
CR161 GY161
1
SR401 GY401
— — — — — — — — — — — — — — — — — —
IO 157 GY157
1
CR377 GY377
1
SR577 GY577
D3–330P CPUs
To get ...
TMR/CNT Current Values use...
TMR / CNT Status Bits
use...
Data Registers
use...
R600 V0 CT600 GY600
1
R401, R400
2
V100
R601 V1 CT601 GY601
1
R403, R402
2
V101
— — — — — — — — — — — — — — — — — —
R677 V77 CT677 GY677
1
R777, R776
2
V237
To get ... g
I/O Points use... Control Relays use... Shift Registers use...
IO 000 GY0
1
CR160 GY160
1
SR200 GY400
IO 001 GY1
1
CR161 GY161
1
SR201 GY401
— — — — — — — — — — — — — — — — — —
IO 157 GY157
1
CR277 GY277
1
SR277 GY477
To get ...
Stage Status Bits use...
S0 GY200
1
S1 GY201
1
— — — — — —
S177 GY277
1
1 You must have CPU firmware V1.9 .
or greater to use the GY data type
i th RX/WX i
t ti
g yp
in the RX/WX instructions.
2 Two bytes of DL305 register data .
t d ith DL205 V
y g
are returned with one DL205 V
memory location.
To get R400,
use V100
Example:
Read current value from R400
into memory location V2000.
If you’re just obtaining I/O or
Timer/Counter values, the task is
fairly simple. But when you work
with data registers, it’s a bit more
involved. Here’s why.
To get R400, you examine the
table and find that you must use
reference V0. You will also notice
that you always get at least 2
registers! So you get R400
and
R401. Since you only want the
contents of R400, you have to
add some ladder logic to get rid of
the data from R401.
LDA
O2000
LD
K2
LD
K201
RX
V100
Read 2
bytes
Store in
V2000
OUT
Vxxxx
ANDD
KFF
LD
V2000
Use ANDD
to remove
R401
Store the
result in a
different V
location
Load
V2000