Minebea Intec PR5900 - Waiting for the Result of the Action

8.2.3.1 Reading status bit
The status bits in bytes 5-7 of the read window are always available and can be read
directly by the master.
8.2.3.2 Writing control bits
Some device functions can be executed by setting bits directly in bytes 6 and 7 (control
bytes) of the write window.
Action of the master Slave reaction
Set bits in the control byte.
Function is executed.
Reset bits in the control byte.
8.2.4 Waiting for the result of the action
When an action requiring more time is started, the end of execution can also be waited
for.
Action of the master Slave reaction
For setting bits, see Chapter 8.2.2.3 or
8.2.3.2.
Set the CmdBusy bit.
Function is executed.
In the event of an error: Set the
CmdError bit and the LastError byte.
If the function is executed or timeout:
reset the CmdBusy bit.
Wait until CmdBusy = 0.
Check the CmdError bit.
If CmdError is set:
Evaluate the LastError (for function
number 4, see Chapter 8.2.5.4)
Set the ResetError bit (for function
number 121, see Chapter 8.2.5.10).
The ResetError bit is reset.
The CmdError bit is reset.
8.2.5 Function numbers
Function numbers are written to MOSI by the master (SPS) and reected in MISO by the
PR 5900.
Depending on the installed application, additional function numbers with application
data may be available (see application manuals).
- Function number 1: scale status (read), see Chapter 8.2.5.1
- Function number 4: calibration information, error byte (read), see Chapter 8.2.5.4
8 Fieldbus interface Process Controller Maxxis 5 PR 5900
EN-351 Minebea Intec