Watlow CLS200, MLS300 and CAS200 User Manual Page 62
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56 Communications Specification
Chapter 3: Controller Parameter Descriptions
System Status (30)
The system status command consists of internal registers that flag
hardware and software exceptions. The system status command takes 4
bytes. (None of the controllers use the last 2 bytes; they are reserved.)
Here is a bit map of the first 2 system status bytes. More than 1 bit can
be set at a time.
Here’s a partial bit map of system status byte 2. The CLS and CAS use
bits 14 and 15 only.
System Command Register (31)
The System Command Register is a register of mode and configuration
flags for the controller’s processor.
• Default: 0.
Bit 0 1
0 Battery OK Dead battery
1 Init Start OK Bad Init Start Bit
2 AIM OK AIM comm failure
3 No Ambient Error Ambient Error
4 No Ambient Warning Ambient Warning
5 Zero Calibration OK Bad zero calibration
6 Full scale calibration
value OK
Bad full scale calibration
value
7 Reserved
8 Alarms delay Off Alarms delay On
9-13 Reserved
14-15 See next table
Bit 15 Setting Bit 14 Setting Result
0 0 Controller has 4 loops
0 1 Controller has 8 loops
1 0 Controller has 16 loops
Bit 0 1
0 Use default output data on
startup.
Use memory data on
startup.
1 Operator keys enabled. Operator keys locked.
2 Unit set to 60 Hz. Unit set to 50 Hz.
3 Ramp-soak time base in hours
and minutes.
Ramp-soak time base in
minutes and seconds.
4 Alarm digital outputs active
Low.
Alarm digital outputs active
High
- CLS200, MLS300 1
- Communications 1
- Specification 1
- Warranty 2
- Contents 3
- Protocol Syntax 9
- Transaction Sequence 10
- Packet Format 12
- Codes in a Packet 12
- Error Checking 14
- Cyclic Redundancy Check (CRC) 15
- Examples 16
- Block Write 19
- Message Data 20
- Data for a Write Command 21
- Two-Byte Data Types 21
- Figuring Block Size 21
- Anafaze/AB Data Table Summary 22
- Number Description 24
- Address 24
- Type Number of Bytes 24
- Overview 27
- The Query-Response Cycle 28
- Serial Transmission 28
- Message Framing 29
- Contents of the Data Field 30
- CRC Error Checking 31
- Function Codes 32
- Diagnostic Subfunctions 33
- Writing Data 36
- Reading Data 36
- Write Examples 38
- Modbus-RTU Data Table Summary 39
- Chapter 3: 45
- All Units 17, 18 47
- Enhanced Features options 49
- Parameters (by number) 51
- Input Type (3) 52
- Output Type (4) 53
- Setpoint (5) 54
- Process Variable (6) 54
- Output Filter (7) 54
- Output Value (8) 55
- Alarm Deadband (12) 55
- Alarm_Status (13) 56
- Ambient Sensor Readings (15) 58
- Pulse Sample Time (16) 58
- High Process Variable (17) 58
- Low Process Variable (18) 58
- Precision (19) 59
- Cycle Time (20) 60
- Zero Calibration (21) 60
- Full Scale Calibration (22) 60
- Digital Inputs (25) 60
- Digital Outputs (26) 61
- Override Digital Input (28) 61
- Override Polarity (29) 61
- System Status (30) 62
- System Command Register (31) 62
- Data Changed Register (32) 63
- Input Units (33) 63
- EPROM Version Code (34) 64
- Options Register (35) 64
- High Reading (37) 65
- Low Reading (38) 65
- Heat/Cool Spread (39) 65
- Startup Alarm Delay (40) 66
- • Range: See tables below 67
- • Default: 0 67
- Current Segment (47) 68
- Segment Time Remaining (48) 68
- Current Cycle Number (49) 68
- Tolerance Alarm Time (50) 68
- Last Segment (51) 68
- Number of Cycles (52) 69
- Ready Setpoint (53) 69
- Ready Event States (54) 69
- Segment Setpoint (55) 70
- Segment Time (58) 72
- Tolerance (59) 72
- Ramp/Soak Flags (60) 72
- Output Limit (61) 73
- Output Limit Time (62) 73
- Alarm_Control (63) 74
- Alarm_Acknowledge (64) 74
- Alarm_Mask (65) 74
- Alarm_Enable (66) 74
- AIM Fail Output (68) 75
- Output Linearity Curve (69) 76
- SDAC Mode (70) 76
- SDAC Low Value (71) 76
- SDAC High Value (72) 76
- Save Setup to Job (73) 77
- Input Filter (74) 77
- Loop Alarm Delay (75) 77
- Loop Names (77) 77
- Channel Name (78) 78
- Manufacturing Test (80) 78
- Cascade Maximum Setpoint (89) 80
- Cascade Base Setpoint (87) 80
- Cascade Minimum Setpoint (88) 80
- Loop Status (96) 82
- Output Type/Disable (97) 82
- Output Reverse/Direct (98) 82
- Controller Type (99) 83
- Ramp/Soak Profile Number (100) 83
- Controller Address (101) 83
- Baud Rate (102) 83
- Ready Events (103) 84
- Appendix A: 85
- Communications Driver 85
- Close_Comm_Port() 86
- DownLoad() 86
- UpLoad() 87
- Glossary 89
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