KEYENCE DL-RS1A User Manual
Page 19
17
Communication Response Time
■ T5 (Response send time from DL-RS1A)
The time required to send a response varies depending on the communication speed, data bit
length, and number of bytes.
For information on the communication settings, refer to page 2.
The response time can be calculated using the following formula:
T5 = (number of bytes) x (data bit length + 4) / (communication speed)
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Number of bytes for different commands
SR command : (number of bytes in the read data) + 12
M0 command : {(number of bytes in the read data) + 1} u number of connected sensor amplifiers + 4
MS command : {(number of bytes in the read data) + 3} u number of connected sensor amplifiers + 4
DRQ input
: {(number of bytes in the read data) + 3} u number of connected sensor amplifiers + 4
SW command : 11
AW command : 8
* For information on the number of bytes in the write data and the number of bytes in the read data,
refer to "Parameters of Commands and Responses" (page 11).
Sample calculation
Number of bytes
Data length
Communication speed
Response time
21
8 bit
9600 bps
26 ms
114
8 bit
9600 bps
143 ms
21
7 bit
38400 bps
6 ms
114
7 bit
38400 bps
33 ms
Communication Response Time
■ T6 (Sensor amplifier settings change time)
For information on the calculation function, refer to the manual supplied with the sensor amplifiers.
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When calculation function of sensor amplifiers is OFF
T6 = 0 ms for SW and AW commands; the sensor amplifiers complete modifying their settings during
the T4 period.
* This table also applies to the sensor amplifiers that do not have the calculation function.
●
When calculation function of sensor amplifiers is ON
SW and AW commands both require the processing time shown below.
With the GT2-100, 50 ms is added to each value in the table.
Number of connected sensor amplifiers
Settings change time (T6)
1
7 ms
2
9 ms
3
13 ms
4
15 ms
5
19 ms
6
21 ms
7
25 ms
8
27 ms
9
31 ms
10
33 ms
11
37 ms
12
39 ms
13
43 ms
14
45 ms
15
49 ms
Important