Instruction manual

Software Description Tank Gate Interface
30 Installation and Operations Manual
Application
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, you may configure the system to communicate with a single host redundantly
using the same protocol. Alternatively, the 8300 series Tank Gate Interface can communicate to
different hosts using different protocols, allowing the 8300 series Tank Gate Interface 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.
BaudRate Baud Rate for communications to either the Host or Slave system. Valid
values are: 1200, 2400, 2400, 9600, 19200. Changing the BaudRate
parameter will immediately change the configuration of the ComPort.
The default is 9600.
ComParams Defines the number of data bits and the parity used by the com port.
Examples include:
8O - 8 Data Bits Odd Parity
8E - 8 Data Bits, Even Parity
8N - 8 Data Bits, No Parity
7O - 7 Data Bits, Odd Parity
7E - 7 Data Bits, Even Parity
7N - 7 Data Bits, No Parity
TI - TIWAY
The default is ‘8N’.
TimeOut Time in seconds that indicates a time-out of communications. If no Host or
Slave communications is received for the length of time specified by the
TimeOut, the CommStatus parameter will indicate Off Line and
communications failure processing will take place.
ErrCheck Error checking used by the protocol. Valid values are:
LRC - Longitudinal Redundancy Check
CRC - Cyclical Redundancy Check
RespDelay Time in milliseconds for which the 8303 TGI will delay a response to the
Host. The default is 50 msec.
SynchMax The SynchMax is used by some slave protocols for autosynchronization 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.
Configuration Parameters Function