Despatch Protocol Plus Modbus Communications Uživatelský manuál Strana 16
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- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03 10
3.6 Holding Register Assignments
Holding registers are intended for information and functions that can be read or written. Each holding
register has a corresponding internal memory variable in the slave device. This association is shown in
the address map table.
Table 6: Protocol
TM
Plus Holding Register Address Map
Data
Address
Hex
Address
Description
Page[menu]
Association or
Range (default
value)
Security
Level
Comments
Global Holding Registers
0
0
Communications Security Code
0-999 (0)
0
Security code setting for remote interface.
1
1
Temperature Display Units
PID[Temp Unit]
1 or 2 (Note 1)
0 = deg. F, 1 = deg. C.
2
2
Reserved for factory use
3
3
Reserved for factory use
4
4
Reserved for factory use
5
5
Keypad Lockout
0 = normal, 1 = locked (0)
2
Disables front panel keypad
6
6
Controller Mode
Read: 1 – 5
Write: 1 - 4
0
1=Manual, 2=Timer, 3=Profile, 4=Autostart, 5=Setup
7
7
Alarm Acknowledge
0 - $FFFF
0
0 = No Action, >0 = Alarm Acknowledge
8
8
Level 1 Password
Enable[Password 1]
2
0 – 999 (Write not allowed while in setup mode)
9
9
Level 2 Password
Enable[Password 2]
2
0 – 999 (Write not allowed while in setup mode)
10
A
Key Press Beep
Control[Key Beep]
1 or 2 (Note 1)
0 = off, 1 = on
11
B
End of Cycle Beep
Control[EOC Beep]
1 or 2 (Note 1)
0 = off, 1 = on
12
C
Alarm Beep
Control[Alarm Beep]
1 or 2 (Note 1)
0 = off, 1 = on
13
D
Setpoint Change Enable
Enable[SPChange]
2
0 = no, 1 = yes
14
E
Analog output type
Enable[Aout]
2
0 = Control (Default), 1 = Process
15
F
Reserved, Available to application
0
0
Control Loop Holding Registers
16
10
Manual SP
Manual[setpt]
0
read/written as xxxx deg. F.
17
11
Manual High Limit SP
Manual[Hi-Lim SP]
0
read/written as xxxx deg. F.
18
12
Manual Event 1-4 Setup
$0 - $F ($0)
0
Bits 0-3 = Events 1-4. Bit value: 0 = Off, 1 = On
19
13
NA
0
0
20
14
Proportional Band (Heat)
PID[P (H)]
1 or 2 (Note 1)
read/written as xxxx deg. F.
21
15
Integral Reset (Heat)
PID[I (H) Rep/Min]
1 or 2 (Note 1)
value is in repeats/min
22
16
Derivative Rate (Heat)
PID[I (H) in sec]
1 or 2 (Note 1)
value is in seconds
23
17
Hysteresis
Control[Hysteresis]
1 or 2 (Note 1)
read/written as xxxx deg. F.
24
18
High Limit Band
Control[Hi-Lim Band]
1 or 2 (Note 1)
read/written as xxxx deg. F. 4 = Off.
25
19
Cycle Time
Control[Cycle Time Sec]
1 or 2 (Note 1)
value is in seconds
26
1A
Proportional Band (Cool)
PID[P(C)]
1 or 2 (Note 1)
read/written as xxxx deg. F. (H/C Version 3.1 Only)
27
1B
Integral Reset (Cool)
PID[I (C) Rep/Min]
1 or 2 (Note 1)
value is in repeats/min. (H/C Version 3.1 Only)
28
1C
Derivative Rate (Cool)
PID[D(C) in Sec]
1 or 2 (Note 1)
Value is in Seconds. (H/C Version 3.1 Only)
29
1D
Heat Offset
PID[Heat Offset]
1 or 2 (Note 1)
read/written as xxxx deg. F. (+/- P Band H) H/C Only
30
1E
Cool Offset
PID[Cool Offset]
1 or 2 (Note 1)
read/written as xxxx deg. F. (+/- P Band H) H/C Only
- Despatch Protocol 1
- Revision History 2
- Approvals 2
- Table of Contents 3
- A-51643 Rev. 6 10/06/03 iii 4
- List of Figures and Tables 5
- A-51643 Rev. 6 10/06/03 v 6
- 1 Overview 7
- 2.1 Support Specifications 8
- 2.2 Timing Specifications 8
- 2.3 Wiring 8
- RS232 Jumper Settings 11
- RS422 Jumper Settings 11
- RS485 Jumper Settings 11
- 3 Register and I/O Mapping 12
- Control Loop Input Registers 14
- Global Input Registers 14
- A-51643 Rev. 6 10/06/03 9 15
- Global Holding Registers 16
- A-51643 Rev. 6 10/06/03 11 17
- A-51643 Rev. 6 10/06/03 12 18
- A-51643 Rev. 6 10/06/03 13 19
- A-51643 Rev. 6 10/06/03 14 20
- 4 Application Operations 21
- Inputs, and Discrete Outputs 23
- 5 Function Set Details 26
- 6.1 Protocol Format 43
- 6.2 RTU Transmission Mode 43
- 6.3 Address Field 44
- 6.4 Function Field 44
- 6.5 Data Field 45
- 6.6 Error Checking Field 45
- A-51643 Rev. 6 10/06/03 40 46
- Figure 6 CRC Flowchart 46
- 7.1 Code Example 48
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