KEYENCE DL-RS1A - Manual (Page 16)

14
Communication Response Time
This section describes the communication response time for each communication command and
various time frames.
Communication Response Time and Time Chart
This section describes the concept of communication response time and the time chart for the
communication commands.
When sending communication commands consecutively from the external device, wait to send
the next command after reception of the response for the previous command from DL-RS1A
completes.
„ SR command
The SR command directly reads data from a sensor amplifier during T4 (DL-RS1A command
processing time).
Time chart
„ M0 command and MS command
The M0 and MS commands read 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.
Point
External device
DL-RS1A T5
T3
T4
T3: Command format send time from external device
T4: DL-RS1A command processing time
T5: Response send time from DL-RS1A
* For the specific values (times) of T3 to T5, refer to
"Time Frames of Communication Response Time" (page 17).
Sensor amplifier
DL-RS1A T1
T2
External device T3
T5 T4
T1: Sensor amplifier response time (Refer to the SK-1000 Series instruction manual.)
T2: DL-RS1A data processing time
T3: Command format send time from external device
T4: DL-RS1A command processing time
T5: Response send time from DL-RS1A
Detection
* For the specific values (times) of T2 to T5, refer to
"Time Frames of Communication Response Time" (page 17).
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
Sensor amplifier
DL-RS1A T1
T2
DRQ input
T5 T4
Detection
2 ms min.
T1: Sensor amplifier response time (Refer to the SK-1000 Series instruction manual.)
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 17).
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 T5, refer to
"Time Frames of Communication Response Time" (page 17).