KEYENCE DL-RS1A/FD-S - Manual (Page 15)

13
Parameters of Commands and Responses
66 Expansion line error
The communication could not be
established due to a problem with an
expansion line.
Check if the separate display unit is
connected. Correctly connect it by
referring to "Connecting the Unit to
Sensor Amplifiers" (page 3). Check that
the connected sensor amplifier is
compatible with the DL-RS1A (refer to
page 4).
67 Write control error DL-RS1A is not in a writable state.
Change the read/write setting switch to
the R/W position to enable writing to DL-
RS1A. For information on the read/write
setting switch, refer to "Part Names and
Functions" (page 2).
Error No. Error name Problem Action
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 14).
Sensor amplifier
DL-RS1A
T1
T2
External device T3
T5 T4
T1: Sensor amplifier response time (Refer to the instruction manual of the sensor amplifier.)
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 14).