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Mstr block write operation, Mstr block write operation -200, 3 mstr block write operation – Delta RMC101 User Manual

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RMC100 and RMCWin User Manual

5-200

400100

2 (decimal): Operation type: Read data

400101

0000 (hex): Error status: will be filled in by function

400102

64 (decimal): Length: there are 16 parameters on
each of four axes

400103

129 (decimal): Address in slave (RMC) memory:
This is the address of the first parameter on the
first axis

400104

0300 (hex): Routing 1: The high byte holds the
Quantum backplane slot ID (3). The low byte
holds the Map Index, which should be set to zero
when communicating with the RMC.

400105

192 (decimal): Routing 2: First byte of the IP
address: 192.168.0.5

400106

168 (decimal): Routing 3: Second byte of the IP
address: 192.168.0.5

400107

0 (decimal): Routing 4: Third byte of the IP
address: 192.168.0.5

400108

5 (decimal): Routing 5: Fourth byte of the IP
address: 192.168.0.5

5.3.7.3 MSTR Block Write Operation

For general information on the MSTR Block, see Using the MSTR Modicon Ladder Logic Block.

Writing with Modbus Plus is described in Reading and Writing Modbus Plus Registers. Writing
with Modbus/TCP is described in Using the Modicon Quantum with the RMC Ethernet Module.

Control Block
In a write operation, the nine control-block registers are assigned as shown:

Register

Content

1st

Operation

: 1

2nd

Error Status

: This register is filled by the

operation. See MSTR Block Error Codes for a
complete list.

3rd

Length

: Indicates the number of registers to write.

4th

Operation-dependent Value

: Indicates the address in the

slave to write to.

Note:

When entering register addresses into an

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