KEYENCE DL-RS1A/FD-S - Manual (Page 16)

14
Communication Response Time
■ DRQ input
The data read in response to a DRQ input is the buffered data that DL-RS1A periodically retrieves
from the sensor amplifiers.
Therefore, the latest data detected by the sensors can only be read after T2 (DL-RS1A data
processing time) where DL-RS1A retrieves data from the sensor amplifiers.
Time chart
■ SW command and AW command
The SW and AW commands are write commands.
Time chart
When reading the data applied by settings written to the sensor amplifier with the SW
command or AW command, using the commands (M0, MS) or DRQ inputs, perform reading
after the above "T2 (DL-RS1A data processing time)" elapses.
Sensor amplifier
DL-RS1A
T1
T2
DRQ input
T5 T4
Detection
2 ms min.
T1: Sensor amplifier response time (Refer to the instruction manual of the sensor amplifier.)
T2: DL-RS1A data processing time
T4: DL-RS1A command processing time
T5: Response send time from DL-RS1A
* For the specific values (times) of T2 to T5, refer to
"Time Frames of Communication Response Time" (page 14).
External device
DL-RS1A T5
T3
T4
Sensor amplifier T6
T3: Command format send time from external device
T4: DL-RS1A command processing time
T5: Response send time from DL-RS1A
T6: Sensor amplifier setting change time
* For the specific values (times) of T3 to T6, refer to
"Time Frames of Communication Response Time" (page 14).
Point
Communication Response Time
Time Frames of Communication Response Time
This section describes the communication time frames (T2 to T6).
The maximum time required is shown for each time frame. However, depending on the
actual environment, it may require more time.
■ T2 (DL-RS1A data processing time)
For information on the calculation function, refer to the manual supplied with the sensor amplifiers.
● When calculation function of sensor amplifiers is OFF *
* This table also applies to the sensor amplifiers that do not have the calculation function.
● When calculation function of sensor amplifiers is ON
■ T3 (Command send time from external device)
Refer to the manual supplied with the external device connected to DL-RS1A.
Reference
Number of connected
sensor amplifiers
Data processing time (T2)
FD-S Series
1 7 ms
2 9 ms
3 13 ms
4 15 ms
Number of connected
sensor amplifiers
Data processing time (T2)
FD-S Series
1 10.5 ms
2 13.5 ms
3 19.5 ms
4 22.5 ms