Baumer N 141 - Manual (Page 6)

N 141
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3.4. Broadcast commands
Some specific commands are defined as so-called broadcast commands. As soon as the master broadcasts a
command to identifier 99, the command is addressed to every SPA in the network. Each individual spindle
position display will accomplish the respective command but will not respond any confirmation to master.
3.5. Data saving
Specific parameters are saved in EEPROM (1.000.000 writing cycles). Data saving is via interface upon every
parameter transmission to SPA.
Important:
There should not be a cyclic transmission of these parameters to the SPA but only if necessary, for example in
case of parameter alteration. The parameters that are saved in EEPROM are listed in the charts in chapter
“Command explanations” or “Overview on commands”.
4. Command explanations
4.1. General information
The following is describing the individual interface commands broken down into the four groups below:
- operating commands [ commands required during operation ]
- parameter commands [ commands for SPA parameterization ]
- identifier commands [ commands to indicate or alter the device identifier (address)]
- specific commands [ commands for specific functions as device reset or version number readout]
The following abbreviations are applied:
SOH = Start of heading (header token)
EOT
= End of transmission (footer token)
Adr = Device address, including offset 20h
Cmd = Command
Data = data transmitted or received
4.2. Operating commands
Command
code
Data amount
inbytes
read write Broad-
cast
Save in
EEPROM
significance
C (43h) 3 / 11 X - - - Check if current value = target
R (52h) 6 X - - - Read current value
T (54h) 7 X - - - Read current value and softkey status
S (53h) 8 X X - X Read / write target
U (55h) 6 X X - - Offset
V (56h) 2 X X X X Read / write profile number
Z (5Ah) 6 X X X X Set preset
t (74h) 6 - X - - Transmit tool number
u (75h) 6 - X - - Transmit optional number sequence