Automation Direct D0-DCM, Руководство пользователя

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MODBUS R
T
U
D0–DCM with
5–10
D0–DCM Using MODBUS
DL05/06 Data Communications Module, 1st Edition, 08/05
The actual equation used to calculate the address depends on the type of PLC data you are
using. The PLC memory types are split into three categories for this purpose.
•
Discrete – X, GX, SP
•
Discrete – Y, C, S, T, CT
•
Word – Timer current value, Counter current value, Data Words
In either case, you basically take the MODBUS address you are trying to target, subtract the
starting MODBUS of that range, convert the result to octal and add the octal number to the
begining PLC address in the appropriate PLC range. See the conversion examples on the
following page. The following tables show the exact range used for each group of data.
For an automated MODBUS/Koyo address conversion utility, download the file
modbus_conversion.xls from the www.automationdirect.com technical support website
> Technical and Application notes> PLC hardware> Coummunications
> app note #
AN–MISC–010.
DL06 Discrete Data Types*
PLC Memory Type
QTY (Dec.)
PLC Range
(Octal)
MODBUS Address
Range Access
Global Inputs (GX) 2048
GX0–GX1746 10001 – 10999
Read
only
GX1747 – GX3777 11000 – 12048
only
Inputs (X) 512 X0 – X777 12049 – 12560
Special Relays (SP) 512 SP0– SP777 13073 – 13584
Reserved – – 13585 – 20000
Global Outputs (GY) 2048 GY0– GY3777 1 – 2048 Read/
Write
Outputs (Y) 512 Y0 – Y777 2049 – 2560
Write
Control Relays (C) 1024 C0 – C1777 3073 – 4096
Timer Contacts (T) 256 T0 – T377 6145 – 6400
Counter Contacts (CT) 128 CT0 – CT177 6401 – 6528
Stage Status Bits (S) 1024 S0 – S1777 5121 – 6144
Reserved – – 6529 – 10000
DL06 Word Data Types*
Registers
(Word) QTY (Dec.)
PLC Range
(Octal)
MODBUS Address
Range Access
V Memory (Timers) 256 V0 – V377 40001 – 40256 Read/
Write
V Memory (Counters) 128 V1000 – V1177 40513 – 40640 Read/
Write
V Memory (Data
Words) 256 V400 – V777 40257 – 40512 Read/
Write Words)
3072 V1400 – 7377 40769 – 43840
Write
4096 V10000 – V17777 44097 – 48192
* Refer to page 5–6 for memory mapping size for the DL05 CPUs. The DL06 has a larger
memory in some areas.
PLC Memory
Supported for
Master Operation