Sharp UP-3301 (serv.man6) Service Manual ▷ View online
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2. System retry function
If a satellite terminates a transmission job unsuccessfully, the master either terminates the job
immediately or awaits a command given through the keyboard, depending on whether the
system retry function is disabled or enabled. When the system retry function is enabled, the
master awaits the entry of a command and retries access depending on the command as
explained below.
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 upload sales reports from all or some of the satellites.
• The satellite has failed to download data to other machines.
Whether the system retry function is enabled or disabled when a transmission error occurs
is programmed at the master. (See “5. Specifying whether to enable or disable the system
retry function when a transmission error occurs” on page 40.)
(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 below.
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 below.
(2) When the system retry function is enabled:
If a transmission error occurs, the machine number and error state of the satellite in which
the error has occurred and the relevant menu window will appear on the display and the
master awaits the entry of one of the following commands given through the keyboard:
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A) RETRY command (touching the RETRY key)
B) ABORT command (touching the ABORT key)
C) IGNORE command (touching the IGNORE key)
A) RETRY command:
When RETRY is selected, the master attempts a RETRY to the satellite; however, it does
not retry when, due to the type of error (for example, command error), it is obvious that the
RETRY will fail. This means that the master will not gain access if errors that have occurred
during transmission are such types of errors.
B) ABORT command:
When ABORT is selected, the master terminates access to the satellite and regards the
transmission as having unsuccessfully ended. However, in the case of program data
downloading, the ABORT command may be issued only when all the satellites accessed are
in the error state.
C) IGNORE command:
When IGNORE is selected, the master terminates access to the satellite, regards the
transmission as having successfully ended and prints only transmitted data.
If no satellites have successfully transmitted data, the IGNORE command may be issued to
the master in the case of sales data inquiry (X report), though the result is not printed.
[Retry during sales data inquiry]
During resetting, the CANCEL command may be given only when every accessed satellite is
in the error state. The IGNORE and RETRY commands are available unconditionally.
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BASIC SPECIFICATIONS
Transmission system:
10 Base-T
Transmission speed:
10 Mbits/sec
Transmission distance:
Segment length max. 100 m
Transmission cable:
Twisted pair cable (Category 5)
No. of connectable machines:
Master: 1
Satellites: max. 15
SHARP CORPORATION
UP3301K_2IE10
