Graco ProMix PD2K Operation page 50

Operation Using a Programmable Logic Controller (PLC)
Network Communication Communication - - - Dynamic
Network Network Communication
Dynamic Dynamic Command Dynamic Command Command Description
The Dynamic Command Structure (DCS) is used to 1) access data that requires some form of argument(s) or 2)
consolidate data that requires multiple registers. The DCS uses a static set of network communication input and output
registers (see Network Input Data Map (Write/Read), page 39
Use the following sequence for the DCS.
1. Write the appropriate command arguments to INPUT REGISTERS 20 – 28. These commands may be written
sequentially or sent all at once.
2. Once all arguments have been passed, write the command ID to INPUT REGISTER 29.
3. The ProMix PD2K will respond to a valid command by writing a 2 (Acknowledge) to OUTPUT REGISTER 61.
4. The ProMix PD2K will write appropriate return values to OUTPUT REGISTERS 52 – 60.
INPUT REGISTER 20
INPUT REGISTER 20+
INPUT REGISTER 29
OUTPUT REGISTER 61
OUTPUT REGISTER 52
OUTPUT REGISTER 52+
Figure 14 Dynamic Command Structure Timing
50
Dynamic Command
Dynamic
Description Description
[arg_0]
[arg_ ]
Command Structure Structure (DCS)
Command Structure
and Network Output Data Map (Read Only), page
Can be written together
or sequentially .
[id]
(DCS)
(DCS)
ACK = 2
[rtn_0]
[rtn_ ]
31.
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