DL8000 Preset Instruction Manual
D-12 Communications Protocols Revised February-2016
In the Modbus protocol, the TAS can directly read the value at this
parameter using read function code.
If the batch is not authorized and the operation timeout flag is not set
(bits 17 and 3 in [63,0,119]) then new preset qty [63,0,39] can be
changed by directly writing to preset quantity [63,0,0] without the TAS
issuing this command. This means if the TAS can determine the batch
volume without input from the operator, the Prompt Preset Volume and
Request Preset Volume commands are not required.
Batch Authorization
The TAS issues an Authorize Batch command (hex 0x0A) to authorize a
new batch for given preset volume [63,0,39].
In the DanLoad 6000 protocol, the command request frame includes the
desired preset volume. For the Modbus protocol the preset value should
be directly written at preset quantity [63,0,0].
When the TAS issues the Authorize Batch command:
The DL8000 displays a loading screen which displays “Start to
Load” and “Stop to Abort” messages.
The system sets the batch authorized flag (bit 17 in [63,0,119])].
The system increments the batch sequence number [63,0,125] by 1
(which rolls from 9999 to 0) indicating the prospective sequence
number of the batch if started.
The operator initiates loading by pressing Start within the timeout time
[63,0,171]. If the batch is aborted (that is, if the operator presses Stop
instead of Start or the DL8000 times out waiting for the Start key to be
pressed), the DL8000 sets the batch aborted and timeout flags (bits 14
and 3), resets the batch authorized flag (bit 17 in [63,0,119]), and
reduces the batch sequence number [63,0,125] by 1.
Batch Start/Restart
The operator can press Start or the TAS can issue a Start/Restart Batch
command (hex 0x0E) to start a new batch or restart a batch which is in
progress but stopped (bits 10 and 21 in [63,0,119]), provided no active
alarm has a severity more than Info (for example, the Current Alarm
Type [63,0,64] has value 0 or 1).
When a batch has been started, the DL8000 sets a flag (bit 10 in
[63,0,119]) to indicate that a batch is in progress.
D.2.3 Stop/End of Batch
Batch delivery stops when any of the following conditions occurs -
The operator presses Stop.
To Next Page
Loading...
