Balluff BIS M-4 045 0 07-S4 Series, Operating Manual

Page: 108 / 202

40
To calculate the permissible speed at which the data carrier and head may move relative
to one another, the static distance values are used
(see chapter 5 "Technical Data", pages 24
to 40).
The permissible speed is:
V
max. perm.
Path 2 * |offset value|
=

=

Time Processing time
The offset value is dependent on the read/write distance actually used in the system.
Processing time = Data-carrier
detection time
+
Read/write time
of first block to
be read
+ n
1
X
Read/write time
for other started
blocks
1
Number of started blocks
Note
The texts, such as "Read time of first block to be read", can also be represented as
variables: t
L1
.
Read and write 44 bytes starting with address 15 of a BIS M-102-01/L data carrier with
EEPROM memory and parameter setting of ALL for "Used data carrier type" using the BIS
M-400-045-001-07-S4 read/write device
The distance from the sensing surface of the read/write head to the data carrier is 12 mm. A
maximum clear zone is assumed, i.e. installation completely in plastic frame.
Address 15 is in block 1 (15/16 = 0.94

block 1)
Address 58 is in block 4 (58/16 = 3.63  block 4)
Therefore, a total of 4 blocks will be processed, where the first block always has a slightly longer
read or write time.
Calculation of read/write time:
Total read time = 20 ms + 20 ms + 3 x 10 ms = 70 ms
Total write time = 20 ms + 40 ms + 3 x 30 ms = 150 ms
For the specified values, this yields an offset of ± 20 mm.
Calculation of maximum speed:
V
max.perm.read
= 40 mm/70 ms = 0.57 m/s
V
max.perm.write
= 40 mm/150 ms = 0.26 m/s
Note
Fluctuations in the ms range are possible. Electrical noise effects may increase the
read/write time.
Maximum speed
Example
calculation
5
Technical Data
BIS M-4 _ _ IO-Link Device
Read/Write Device