Pepperl+Fuchs IDENT-I system P IPT FP Series Manual page 40

IPT*-FP WITH U-P6-B5-V
Operation on the INTERBUS
The start and end of the read range are stored in the bytes 0 and 1 of the "control word". As
soon as the data carrier is supplied with energy the data carrier sends out the data from the
data range, which is defined by the read range start and end. The data range between read
range start and end can be read with the read commands SR (single read words) and ER
(enhanced buffered read words) when <WordAddr> is set to 0000h and <WordNum> is set to
00h.
The advantages of the "default read" operating mode lie in the readout speed. The readout of
one data word (4 bytes) is twice as fast in this mode. The readout of 2 words takes approx. 1/3
less time. Starting at 3 data words there is no more time advantage since this mode is only
intended for the reading of a maximum of 2 words (=8 bytes). Reading larger data ranges can
lead to error messages when the read head does not respond within the planned reaction time.
Single Write Configuration
Byte
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Byte 9
Response:
Byte
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
.
.
.
Byte 9
One attempt is made to write a word in the configuration range from the address <RegAddr>. In
order to write in the configuration range, the password mode must be active.
40
Content
Command code
Reserved/Toggle bit
not relevant
Address in the configuration
range
Data 00 ... FF
h
Data 00 ... FF
h
Data 00 ... FF
h
Data 00 ... FF
h
not relevant
not relevant
Content
Command code
Reserved/Toggle bit
Status
Execution counter
not relevant
.
.
.
not relevant
B7 B6 B5 B4 B3
0 0 0 1 0
- - - - -
- - - - -
<RegAddr>
<Data>
<Data>
<Data>
<Data>
- - - - -
- - - - -
B7 B6 B5 B4 B3
0 0 0 1 0
- - - - -
<Status>
<ExecCounter>
- - - - -
- - - - -
- - - - -
B2 B1 B0
0 1 0
- - T
- - -
- - -
- - -
B2 B1 B0
0 1 0
- - T
- - -
- - -
- - -