Bitzer CM-SW-01 User Manual

2 SG-150-1
Table of contents
1. Read this first! 4
1.1 Reference guide 5
1.2 Safety 5
2. Definitions 6
3. Functions 7
3.1 Control functions 7
3.2 Monitoring and diagnosis 7
3.2.1 Motor temperature 7
3.2.2 Discharge temperature 8
3.2.3 Oil supply 8
3.2.4 Short-cycling warning 8
3.2.5 Application limits 9
4. Datalog 11
4.1.1 Alarms 11
4.1.2 Events 11
4.1.3 Datalog information 11
4.1.4 Periodic data 11
4.1.5 Statistics and counters 12
4.1.6 Accumulated operation counters 12
4.1.7 Capacity load 12
4.1.8 Daily counters 12
4.1.9 Runtime statistic 12
4.1.10 Compressor start statistic 12
5. Control of the CM-SW-01 13
5.1 Commands and setpoint 13
5.1.1 Command Start 13
5.1.2 Setpoint – and speed changes 13
5.2 Enable serial control 13
5.3 Required signals to start the compressor 14
5.3.1 Digital and analogue signals 14
5.3.2 Serial control (Modbus) 14
5.4 Control Word bit definitions 14
5.4.1 Data valid bit 14
5.5 Examples of Serial Control Word setups: 15
5.6 Status Word bit definitions 15
5.7 Setting the serial setpoint 16
5.8 Serial Control Timeout Function 16
6. I/O List for CM-SW-01 17
7. Drawings 19
8. Standards 20
9. Alarm system 21
9.1 Alarm severity types 21
9.2 Fault reset types 21
9.3 Alarm list 22
10. Programming and monitoring 26
10.1 Introduction 26
10.2 Serial communication 26
10.2.1 Modbus (RTU) configuration 26
10.2.2 Data values, scaling and data types 27
10.2.3 Reading and writing 32 bit values via Modbus 27
10.2.4 Modbus function codes 27
10.2.5 Modbus exception codes 27
10.3 Parameters 28
10.3.1 Control – application 28
10.4 Status data 29
10.4.1 Status – alarm 29

Bitzer CM-SW-01 Specifications

General

Brand	Bitzer
Model	CM-SW-01
Category	Control Unit
Language	English