Microscan MS-890, User Manual, Page: 238 / 308

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MS-890 Industrial Automation Scanner User Manual
Scanner Status Requests
Scanner Status Requests
<?> Status Byte
The scanner responds to a status request <?> with a two character hex value, for example
<?/22> . To determine the status:
1. Look up the binary conversion in the hex-to-binary table.
For example, the first 2 in binary would be 0 0 1 0 as read from binary digits 3 through
0 ; the second 2 the binary digits 7 through 4 which is also 0 0 1 0 .
2. Next, enter your binary values in the “Scanner Status” table,
in the “Binary” column next to the appropriate bit.
3. Under “Binary,” interpret
1
s as true and the
0
s as not true.
For example, bit 1 has a
1
in the “Binary” column, indicating
“Command Received.” Bit 5 is also a
1
indicating that the
“Scanner is in a read cycle.”
<?1 > Extended Status
The scanner responds to an extended status request <?1> with
several fields, for example: <?1/20><35-558002-10,35-558001-
12,F6D4,20C5,02D3,02D3> .
These represent, in order: the status byte discussed above, the boot part number (35-558002-10) ,
the application part number (35-558001-12) , boot checksum (5F6D4) , app checksum
(02D3) , RAM parameter checksum (02D3) , and flash parameter checksum (02D3) .
<K?> All Commands Status
This is the fastest way to learn the scanner’s current configuration. Sending this request
will return the current settings of all commands, starting with the lowest K command value
and ending with the highest K command value.
<Knnn?> Single Command Status
This request will return the value of the variables associated with the requested K command.
The request of a single entry of a database command cannot exceed the number of database
slots for the specific command.
Bit Binary Scanner Status
0 0 Command error detected
1 1 Command received
2 0 Communication error detected
3 0 Flash sector unprotect failure
4 0 Host/Aux port buffer overflow
5 1 Scanner is in a read cycle
6 0 Software Watchdog reset
7 0 Hardware Watchdog reset
Hex
Value
Binary
Bit Digits
7 6 5 4
3 2 1 0
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1