Sharp UP-3500 - Manual (Page 56)

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If a transmission job from the master to a satellite is not performed successfully, the master either
terminates the job immediately or enters command entry awaiting state depending on whether the system
retry function has been disabled or enabled. When the system retry function has been enabled, the master
awaits entry of a command and retries access depending on the commands as explained on the following
page.
System retry function is also available at satellites depending on a type of transmission error.
This function is used in the following cases:
• The master has failed to download preset or updated data to all or some of the satellites.
• The master has failed to collect sales report data from all or some of the satellites.
• The satellite has failed to download data to other machines.
• A clerk has failed to sign off at a satellite.*
Whether the system retry function is enabled or disabled when a transmission error occurs is
programmed both at the master and a satellite. (See “5. Specifying whether to enable or disable the
system retry function when a transmission error occurs” on page 41.)
*When a clerk has failed to sign off at a satellite for some reason (e.g. the master is busy), the RETRY
and ABORT commands are available but the IGNORE command is not.
(1) When the system retry function is disabled
The master terminates the transmission job immediately in the following two ways.
If none of the satellites have successfully transmitted data, the transmission is regarded as having
ended with an error, which is equivalent to ABORT as discussed on the following page.
If there is any satellite which has successfully transmitted data, the transmission is regarded as either
successful or unsuccessful depending on the type of transmission job. In this case, the transmission
regarded as successful and the one regarded as unsuccessful are equivalent to IGNORE and ABORT,
respectively, both of which are explained on the following page.
2. System retry function