Edwards SCU-800 - Page 91

SCU-800 Control Unit for Turbomolecular Pump
MT-49E-101-G
Page 79
5
SERIAL COMMUNICATION
PROTOCOL
Communication cycle start
Succeeded?
Decode process
Error process
Address selection:
First TMP
RS485 multipoint
connection?
Address selection:
Next TMP
Communication cycle end
Command sending process
Succeeded?
Answer receiving process
Yes
This procedure is not necessary
if TMP connection number = 1.
No
Yes
Yes
Yes
Yes
No
No
No
No
RS485 multipoint
connection?
Address check:
Last TMP?
Figure 46 - Example of communication cycle process