Srn Flag Send Check; Srn Data Send Check; Data Transmission Check - Sharp ER-A750 Service Manual

2) SRN Flag Send Check

1 Check content
Execute diagnostics 3 command to send Flag (7EH) continuously.
2 Display
SRN Flag Send Check
3 Terminating procedure
Perform the service reset.

3) SRN Data Send Check

1 Check content
Execute diagnostics 4 command to send data of 00H
(256Byte) as one packet at 12.8msec packet interval at 1Mbps
continuously.
2 Display
SRN Data Send Check
3 Terminating procedure
Perform the service reset.

4) Data Transmission Check

Data transmission is checked in an actually composed system. The
system is composed of one master machine and max. 15 satellite
machines.
Note for starting the check
•
When checking the set in which the SRN setting has been made,
cancel the SRN setting before starting this check.
•
When checking the actually composed system, disconnect the
SRM cables of the sets which are not checked, or cancel the SRN
setting. If it is set to "SRN exits," data may be destroyed.
•
The transmission check setting must be performed after canceling
the SRN setting of all the sets in the system. First, set the satellite
machines, then set the master machine.
1 Setting procedure
•
Satellite machine setting
In the menu screen, select "Data Transmission Check (Satel-
lite)."
The display is as follows:
Data Transmission Check (Satellite)
Input Terminal Number
Enter the terminal No. (000
be checked and press the ENTER key. The display is as shown
below.
Data Transmission Check (Satellite)
Input Terminal Number : xxx
Data Sequence Number
0000
FFH
:
254, 3 digits) of the machine to
–
The entered terminal
No. is displayed.
:
•
Master machine setting
In the menu screen, select "Data Transmission Check (Master
Machine)." The display is as shown below.
Data Transmission Check (Master)
Input Master Terminal Number
Enter the terminal No. (000
be checked and press the ENTER key. The display is as shown
below.
Data Transmission Check (Master)
Input Master Terminal Number
xxx
Input Satellite Terminal Number:
Enter the terminal No. (000
be connected to the machine to be checked and press the
ENTER key. The display is as shown below.
Data Transmission Check (Master)
Input Master Terminal Number
Input Satellite Terminal Number:xxx
When checking with two or more satellite machines connected,
enter the terminal No. (000
ENTER key similarly. To execute, press the ENTER key
without entering the terminal No. The display is as shown
below. Do not use the same terminal No. for different machines
(master/satellite).
Data Transmission Check (Master)
Input Master Terminal Number
Input Satellite Terminal Number : xxx
xxx xxx xxx xxx xxx
Data Sequence Number
0000
With the above setting, data transmission between the master
machine and the satellite machine is started.
2 Check content
•
Data in the following format composed of 2byte sequence No.
and 254byte AAH data are transmitted from the master
machine to the satellite machine. The master machine displays
the sequence No.
1 2 3 4
XX XX AA AA
XXXX : Sequence No. (2byte: 4digits of binary decimal numbers)
AA : Transmission data (AAH) x 254 bytes
•
The satellite machine sends back the received data to the
master machine. The satellite machine displays the received
sequence No.
•
The master machine receives the data, and checks the se-
quence No. and 256byte AAH data. In case of an error, the
master machine displays an error code and terminates the
check. If two or more satellite machines are used, the above
operation is repeated. If data transmission with all the satellite
machines are normally completed, the master machine incre-
ments the sequence No.
6 – 9
:
254, 3 digits) of the machine to
–
:
254, 3 digits) of the machine to
:xxx
–
254, 3 digits) and press the
: xxx
5 254 255
AA AA AA
The entered
terminal No. is
displayed.
The entered
terminal No. of
satellite machine
is displayed.
:
256 Byte
AA