Delta RMC151 - Manual (Page 548)

RMC70/150 and RMCTools User Manual
Read Any Contiguous RMC70 Registers
To read any contiguous RMC70 registers, use the Command Block register 8 and the
Response Block registers 16-23.
To read any contiguous RMC70 registers, use the following steps:
• Wait until the Command Block register 8 Read/Write Request bit is equal to the
Response Block register 16 Read/Write Acknowledge bit. If they are not equal, the
RMC70 is currently processing a read or write request.
• Clear the Command Block register 8 Read/Write bit.
• In the Command Block register 8, set the Read/Write Address File and Read/Write
Address Element to the first RMC70 address you wish to read. For example, for
address %MD8.12, the file is 8, and the element is 12. Set the Count to the number of
register to read, up to 7. For a description of all RMC70 registers and their addresses,
see the RMC70 Register Map topic.
• Toggle the Read/Write Request bit.
• Wait until the Read Request bit is equal to the Read/Write Acknowledge
bit. When they are equal, the RMC70 will have updated the Response Block registers
16-23 with the requested data.
To further clarify the ordering, keep these basic rules in mind:
• Do change the read address and Read/Write bit before toggling the Read/Write
Request bit.
• Do not change the Read/Write Request bit after a read request until you have
processed the data in the Read Response register.
• Do not change the read address or Read/Write bit when the Read/Write Request
bit does not match the Read/Write Acknowledge bit.
Write to Any Single RMC70 Register
To write to a single RMC70 register, use the Command Block register 6 and the Response
Block register 0. Register 0 of the RMC70 Indirect Data Map must be mapped to the Axis
0 Status Bits register.
To write to the RMC70, use the following steps:
• Wait until the Command Block register 6 Read/Write Request bit is equal to the
Response Block register 0 Read/Write Acknowledge bit. If they are not equal, the
RMC70 is currently processing a read or write request.
• Copy the value you wish to write to the RMC70 into the Write Value register (7) of the
Command Block.
• In the Command Block register 6, enter the Read/Write Address file and element. For
example, for address %MD56.0, the file is 56, and the element is 0. For a description
of all RMC70 registers and their addresses, see the RMC70 Register Map topic.
• Set the Command Block register 6 Read/Write bit.
• Toggle the Read/Write Request bit.
• Wait until the Read/Write Request bit is equal to the Read/Write Acknowledge
bit. When they are equal, the RMC70 has received the data written to it.
To further clarify the ordering, keep these basic rules in mind:
• Do change the Read/Write bit, write address, and write value before toggling the
Read/Write Request bit.
528 Delta Computer Systems, Inc.