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Data Carrier Speed
Calculation Method (Reference)
Read/Write
Read
Write
N: Number of bytes processed
Section
(Unit: ms)
Lower-level transmission time
T = 1.8N + 48.4
T = 4.2N + 86.5
3-3
3-3
Data Carrier Speed
The number of bytes that can be processed using the Auto Read and Auto Write
commands depends on the speed of the DC. The relationship between the num-
ber of bytes and DC speed in m/minute can be determined from the following
equation.
Max. DC Speed =
Distance travelled in the transmission range (m)
Lower-level transmission time (min)
? The “ distance travelled in the transmission range (m) ” is the maximum width of
the transmission range (in the X direction). Refer to the diagrams in 3-1 Trans-
mission Range .
? The “ lower-level transmission time (min) ” is the time required for transmission
between the DC and the R/W Head. For details regarding this calculation, refer
to 3-2 Transmission Time .
Calculation Example
In this example diagram, the V600-D8KR04 and V600-H07 are combined and
four bytes are read.
110 mm
This diagram shows the following:
Distance travelled in transmission range, Y (transmission distance) = 110 mm
Lower-level transmission time, T = 1.8 x 4 + 48.4 = 55.6 ms.
Accordingly, the DC speed in this case will be as follows:
Max. DC Speed =
Distance travelled in the transmission range (m)
Lower-level transmission time (min)
=
110 (mm)
55.6 (ms)
= 118.7 m/min
Note
1. The distance travelled in the transmission time will vary depending on the
read/write distance and the shaft slippage. Refer to the diagrams in 3-1
Transmission Range .
2. The DC speed is the standard value. Before using the equipment, run a test
to determine the speed under the actual operating conditions.
3. The DC speed data above do not take into account possible transmission
errors in host or lower-level communications.
4. When the V600-CA8A/CA9A is used, the speed will vary depending on the
software at the host device.
19
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