Edwards SCU-1600 - Page 7

SCU-1600 Control Unit for Turbomolecular Pump
March 10 iii Issue 1-a
PAGE
iii
CONTENTS (CONTINUED)
Section Title Page
5 SERIAL COMMUNICATION PROTOCOL 65
5.1 Introduction 65
5.2 Connection and setting up 65
5.2.1 Signal connection 65
5.2.2 Connecting the RS485 68
5.2.3 Communication parameter setting 69
5.3 Protocol specifications 69
5.3.1 General description 69
5.3.2 Standard transmission frame
(in the RS232/RS485 single point connection) 70
5.3.3 Control command
(in the RS232/RS485 single point connection) 71
5.3.4 Query command
(in the RS232/RS485 single point connection) 72
5.3.5 Transmission data format 73
5.3.6 Frame control (checksum) 74
5.3.7 Error control 74
5.3.8 Transmission frame in the RS485 multi-point connection 74
5.3.9 Control command in the RS485 multi-point connection 76
5.3.10 Query command in the RS485 multi-point connection 77
5.3.11 Broadcasting command in the RS485 multi-point connection 78
5.4 Command specifications 79
5.4.1 Command list 79
5.4.2 ReadMeas 80
5.4.3 Command 80
5.4.4 ReadFailMess 81
5.4.5 ReadModFonct 84
5.4.6 ReadVersion 86
5.4.7 ReadCounters 87
5.4.8 ReadSetPoint 88
5.4.9 ReadMotorTemp 88
5.4.10 ReadStatus 89
5.4.11 ReadEvents 90
5.4.12 SetSpeedSetPoint 91
5.4.13 ReadSpeedSetPoint 92
5.4.14 ReadModFonctWithWarning 93
5.4.15 ReadMeasValue 96
5.4.16 SetOptions 98
5.4.16.1 Second speed option setting 98
5.4.16.2 Second speed selection 99
5.4.17 ReadOptions 100
5.4.17.1 Second speed function setting 100
5.4.17.2 Second speed select 101