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34 Communications Specification
Chapter 2: Modbus-RTU Protocol
The storage requirements for some parameters depend on the number of
digital inputs or digital outputs to the controller (MAX_DIGIN and
MAX_DIGOUT). The storage of ramp-soak profile parameters depend
on the number of profiles (MAX_RSP), the number of segments per
profile (MAX_SEG), the number of triggers per segment
(MAX_TRIG), and the number of events per segment (MAX_EVENT).
The table below shows the values for each of these factors. Use them to
calculate the number of registers for each parameter.
NOTE
Data table parameters 46 to 60, 100 and 103 are ramp-soak
parameters. They are only used in controllers with the
ramp-soak option. Parameters 81 to 95 are enhanced fea-
tures and are only available in controllers with the
enhanced features option.
Ordering of Heat and Cool Channel Parameters
For parameters that have both heat and cool settings, the heat values are
stored in the first registers and the cool values are stored in the registers
starting at the listed address plus MAX_CH.
Ordering of Ramp-Soak Profile Parameters
Ramp-soak profile parameters are ordered first by profile, then by
segment where applicable. So, for example, the first 35 registers of the
Ready Events parameter are the ready segment event states for the first
profile (profile A), the next 35 registers are for profile B, and so on. In
the case of the segment triggers, the first register contains the first
trigger setting for the first segment of profile A, the second register
contains the settings for the second trigger for the first segment of
profile A, the third register contains the settings for the first trigger for
the second segment of profile A, and so on.
MAX_CH:
4CLS/CLS204 (4 loops + 1 pulse loop)
8CLS/CLS208 (8 loops + 1 pulse loop)
16CLS/CLS216/CAS200 (16 loops + 1 pulse loop)
16MLS/MLS316 (16 loops + 1 pulse loop)
32MLS/MLS332 (32 loops + 1 pulse loop
5
9
17
17
33
MAX_DIGIN 8
MAX_DIGOUT 35
MAX_RSP 17
MAX_SEG 20
MAX_TRIG 2
MAX_EVENT 4
- 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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