Varec TankGate Interface 8315 Series Manuel d'instructions Page 35
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8315 TGI Software Description
Varec, Inc. 25
The Modbus Slave protocol handler is flexible, allowing the user to set options for handling
several aspects of Modbus communications. The Modbus Slave uses the GWBLK Gateway Block
as a lookup table for data addresses.
The Gateway Block allows the user to specify data address and point reference combinations.
This allows the Tank Gate Interface to be used with an existing system that is already configured.
The user defines a GWBLK point and specifies which parameter in the Tank Gate Interface will
be used for a particular address. When a request from a master is received, the Modbus Slave
protocol handler will first search for any GWBLK points and determine if the data address of the
request is specified in one of the GWBLK points. If the data address is contained in a GWBLK
point, then the corresponding point reference is used to provide the data for the reply to the
master.
COM 0 will automatically sense whether the host system is ViewRTU or a Modbus Master. The
communications parameters for COM 0 are 9600 baud, 8 data bits and No Parity. When
switching between ViewRTU and Modbus communications, it is necessary to wait 60 seconds for
the current protocol to time-out. The Tank Gate Interface will go back to the auto sensing mode
and wait for a request. When a request is received, the Tank Gate Interface will determine if the
request is from ViewRTU or a Modbus Master. If the Tank Gate Interface has problems switching,
press the Reset button and this will force the Tank Gate Interface back into the auto sensing
mode.
Note COM 1 (if available) is always a Modbus Slave. The communications parameters for
COM 1 are 9600 baud, 8 data bits and No Parity. COM1 is not available on the 8315 Tank
Gate Interface
Note The Tank Gate Interface uses the ID switch in determining to which address on the
communications bus to respond.
Tank Gate Interface responds to the following Function Codes:
There are two methods for data addressing within the Tank Gate Interface
• The Tank Gate Interface has a fixed Modbus Map of selected parameters
• Gateway Block (GWBLK) software blocks can be configured to set the data address
Function Code Description Comments
3 Read Output
Register
FC 3 and FC 4 are treated the same. Use either FC 3 or FC 4 to read
data from the Tank Gate Interface
4 Read Input
Register
5Force Single
Output Status
FC 4 and FC 6 are treated the same. Use either FC 5 or FC 6 to write
data to the Tank Gate Interface
6Preset Single
Register
15 Force Multiple
Outputs
FC 15 and FC 16 are treated the same. Use either FC 15 or FC 16 to
write multiple registers to the Tank Gate Interface
16 Preset Multiple
Registers
- 8315 Tank Gate Interface 1
- Copyright 3
- Trademarks Acknowledged 3
- Disclaimer of Warranties 3
- Terms of Use 4
- Safety Precaution Definitions 5
- Safety Precautions 5
- Varec, Inc. vii 9
- Contents 10
- 1Overview 11
- Overview Tank Gate Interface 12
- 1.4.7 Surge protection 13
- 1.4.8 Operating temperature 13
- 1.4.9 Humidity 13
- 1.4.10 Storage temperature 13
- 2 Hardware 15
- Hardware Tank Gate Interface 16
- 2.2.1 Power Supply 17
- 2.2.2 Switches and Indicators 19
- 2.2.2.2 Hard Reset 20
- 2.2.3 Communications 20
- 2.2.3.1 COM0 (J7) 21
- Figure 2-12: COM1 SW2 Switch 22
- Figure 2-13: COM1 SW1 Switch 22
- 3.1 Features 25
- 3.2 Description 25
- Address 1 Shown 26
- 3.2.2 LED Indicators (D1-D6) 27
- Figure 3-4: Input Circuit 28
- Figure 3-5: Application 28
- 4 Software Description 29
- 4.1.4 Communications 30
- 4.1.5 Protocols 30
- 4.1.6 Data Scanning Task 30
- 4.1.7 Database Manager 30
- 4.1.8 System Tasks 31
- 4.2 Database Organization 31
- 4.2.1 Point Format 31
- 4.2.2 Parameter Description 31
- 4.3 Gathering Point Data 33
- 4.3.2 Change of State Format 33
- 4.3.4 Modbus Communications 34
- 4.3.5 Fixed Modbus Map 36
- 4.3.6 GWBLK method 36
- Varec, Inc. 27 37
- 4.4 Common Software Blocks 39
- 4.4.4 Emulator (EMU) 41
- 4.4.5 EMU Gateway (EMUGW) 43
- 4.4.6 Gateway Block (GWBLK) 44
- 4.4.7 Integer Register (IREG) 46
- 4.4.8 Modbus Gateway (MODGW) 46
- 4.4.9 Scaler Point (SCALER) 48
- Varec, Inc. 41 51
- 5.1.1 Parameters 53
- 5.1.2 Application 55
- Tank Gate Interface 56
- 5.2.1 Parameters 57
- 5.2.2 Application 58
- 5.3.1 Parameters 59
- 5.3.2 Application 60
- 8315 TGI 61
- Varec, Inc. 51 61
- 5.4.1 Parameters 63
- 5.4.2 Application 64
- Varec, Inc. 55 65
- 5.5 L&J Scanner (LJSCAN) 67
- 5.5.3 Fast Scan 68
- 6 Installation 71
- 8315 TGI Installation 73
- Varec, Inc. 63 73
- 7Using ViewRTU 75
- 7.4.1 ViewRTU window 77
- 7.5 The ViewRTU Menu Bar 77
- 7.5.1 The File Menu 77
- 7.5.2 The Point Menu 78
- 8315 TGI Using ViewRTU 79
- Varec, Inc. 69 79
- Figure 7-7: Edit Point dialog 80
- 7.5.3 The Config Menu 81
- 7.5.4 The Communications Menu 83
- 7.5.5 The Options Menu 85
- 7.5.6 The Help Menu 86
- 7.6 Using ViewRTU 87
- 7.6.1 Overview 87
- Varec, Inc. 79 89
- 7.6.3 To modify a Value 90
- Varec, Inc. 81 91
- Varec, Inc. 83 93
- Varec, Inc. 85 95
- Varec, Inc. 89 99
- 8 Troubleshooting 101
- 8.2.4 Performing a Hard Reset 103
- 8.3 Maintenance 104
- • Close the enclosure door 105
- A Appendix - Order Codes 107
- IOM035GVAE1313 110
- Document Code 110
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