8315 L&J Tankway Software Description

TankGate Interface

 

 

 

 

 

 

 

Configuration

Function

 

Parameters

 

 

 

 

 

RespDelay

Time in milliseconds that RTU will delay a response to the Host. The

 

 

default is 50 msec.

 

 

 

 

SynchMax

The SynchMax is used by some slave protocols for auto-

 

 

synchronization of the BaudRate. The SynchMax is used to determine if

 

 

the BaudRate is correct. If the SynchMax is zero, then no

 

 

synchronization is attempted.

 

 

 

 

DirectPort

The DirectPort is used then the Protocol is set to Direct.

 

 

 

Dynamic Parameters

Function

 

 

CommStatus

Coded variable indicating the On-line/Offline status of the COM

 

point

 

 

State

Current state of the message being sent/received

 

 

Command

Current command being processed

 

 

Status

Status if the last message

 

 

CommErrors

The number of communication errors

 

 

NumTrans

The number of transactions

 

 

Elapse

Time of the last Change of State

 

 

PntCheckSum

CRC-16 Checksum of point's static Configuration Parameters

 

 

4.7.2Application

The COM point controls the operation of Host and Slave communications. The Baud Rate, Communications Parameters and Protocol may be changed by assigning values to the appropriate parameter. Each Com port is independent of the other and completely flexible in its use.

For example, the user may configure the system to communicate with a single host redundantly using the same protocol. Alternatively, the TankGate can communicate to different hosts using different protocols, allowing the TankGate to act as a bridge. Other options include assigning one COM point to communicate with a Slave device while communicating to a Host system on the other.

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Installation and Operations Manual

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Varec 8315 Series manual Application