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Assembly object
Status query
Function Description
Input and Output Buffers
To query the current status of both heads on the processor, the
assembly object
(class
0x04, instance 0x64, attribute 0x03) can be accessed. The controller accesses the
assembly object
by using
explicit message
.
The
explicit-message
connection must have been successfully opened by the controller.
The call
GetAttributeSingle
returns 4 bytes:
Byte 3
Byte 2
Byte 1
Byte 0
Head 2
Head 1
Input buffer
Byte 1
Input buffer
Bit header (00
Hex
)
Input buffer
Byte 1
Input buffer
Bit header
For additional informatoin on the input buffer, see 40ff.
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C60_3-025_825645_1310_e.p65
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Configuration of the
output buffer for one
read/write head
(Example shown for
Head 1)
Function Description
Mode 1: Output buffer, configuration and explanation
Bit No.
7
6
5
4
3
2
1
0
Subaddress
00
Hex
= Bit Header
CT
TI
HD
GR
AV
Bit Name
01
Hex
Command Designator
or
Data
02
Hex
Start Address (Low Byte) or Program No.
or
Data
03
Hex
Start Address (High Byte)
or
Data
04
Hex
No. of Bytes (Low Byte)
or
Data
05
Hex
No. of Bytes (High Byte)
or
Data
06
Hex
Data
...
Data
Sub-
Bit
Meaning
Function Description
address
Name
00
Hex
CT
Data carrier type Select data carrier type:
for data carrier type:
Bit Header
0
32 Byte block size
BIS C-1_ _-02, -03, -04, -05
1
64 Byte block size
BIS C-1_ _-10, -11, -30
TI
Toggle-Bit In
Shows during a read action that the controller is ready
for additional data.
HD
Select head
For Head 1:
For Head 2:
0
Select Head 1.1
Select Head 2.1
1
Select Head 1.2
Select Head 2.2
GR
Ground state
Causes the BIS system to go to the ground state
for the respective read/write head.
Any pending command is cancelled.
(continued next )
Description of
Output Buffer
Please note the
basic procedure on
30 and the
examples on pages
50...64.
