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8315 L&J Tankway Software Description TankGate Interface
36 Installation and Operations Manual
4.7.2 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, 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.
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
Configuration
Parameters
Function