SFA-5000 • SFA-10000 Profibus
Finally press the
Command variables
button in the Toolbar (see the
icon here on the right).
Now the position of the encoder is 0000 0500hex.
To close the “Preset” procedure set the bit 31 of the variable 100 back to ”0” and
then press the
Command variables
button again.
NOTE
It may occur that data variables having index higher than 127 or data greater
than 4 bytes are not treated properly in STEP7 software. Should this happen, we
recommend "MD" reference operators (pointers) for encoder position, speed and
Preset to be used.
5.4 Setting the node address via BUS (SAP55 service)
WARNING
SAP55 service can only be accomplished by a
Class 2 DP Master (DPM2)
. Class
1 Masters (DPM1) cannot accomplish the SAP55 service.
Lika SFA PB draw-wire encoders are designed to allow the Slave address setting
either via hardware switches (see the “4.7 Node Address: DIP A (Figure 3 and
Figure 4)” section on page 30) or via a bus command by means of the SAP55
service.
The Service Access Point SAP55 Set_Slave_Address allows to change the address
stored in the internal memory of a Slave device. SAP55 service is part of the
Profibus specifications and allows to change the internal memory address in the
event that the device does not provide switches for setting its address or they
are not usable. The address stored in the internal memory of the Slave is used
only if the hardware switches are set to “126”. The internal memory address
stored at factory by Lika Electronic is “125”. On the contrary, if the hardware
switches are set to any value between 0 and 125, then the external switches will
determine the Slave address.
MAN SFA_5000_10000_PB E 1.0
Quick reference
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