BSA Flow Software Installation and User's Guide - CSI

How It Works
0 No error.
1 Generic user error, failed to understand
input message.
The string returned from the controller to the
driver could not be understand. The string must
follow the protocol described in Table 6.5-2)
Table 6.5-1.
2 Generic user error, return code out of range.
User supplies error return codes must be larger
than 100.
3 Generic user error, failed to understand
command response.
The command received is not among the one
described in Table 6.5-2)
Table 6.5-1.
4 Generic user error, failed to understand
extension response.
The command extension, e.g. for the READ
command, must follow the protocol described in
Table 6.5-2)
Table 6.5-1.
5 Generic user error, failed to read position.
The position formatting in READ could not be
read.
>100 Error, error codes supplied by user.
Table 6.5-2: User error return codes.
Most of the commands are called when the traverse is not moving, this is
controlled from this driver, and can be explained as synchronous. However
two commands MOVE and HOME are asynchronous.
Synchronous call The traverse is not moving and you want to reset the current position to the
new reference position. You make the command RESET and the traverse
driver will wait for the controller to answer. If the traverse is moving the
command will not be executed from the driver and the controller will not get
the command at all. All synchronous calls must be answered right away,
otherwise a time-out (default 5 sec.) will occur in the driver.
Asynchronous call When you want to move the traverse you send the MOVE command to the
driver and the driver will send the command to the controller if the traverse
is not already moving. The controller should not respond to this command
until the traverse stops. In the meantime the controller can be called with
either a STOP command or a READ command. The STOP and READ
commands are synchronous, and the controller must answer these command
right away, see Figure 6-68. In some cases the controller controls a traverse
which cannot request positions while moving, in this case the READ
command is answered with the starting position until it stops.
6-72 BSA Flow Software: Options and Add-ons