KEYENCE DL-RS1A - Manual (Page 18)

16
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)
z 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}
× number of connected sensor amplifiers + 4
MS command : {(number of bytes in the read data) + 3} × number of connected sensor amplifiers + 4
DRQ input : {(number of bytes in the read data) + 3} × 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 10).
Sample calculation
„ T6 (Sensor amplifier settings change time)
SR command : T6 = 0 ms
AW command
Up to 5 amplifier units: T6 = 0 ms
6 amplifier units or more: T6 = 25 ms
From the completion of the T4 command processing until after the T6 period, the sensor amplifier will
complete modifying settings. When T6 = 0 ms, the applied data of modified settings after receiving a
response (after T5 period), can be read using the read commands (M0, MS) or DRQ input.
In the event that the below data numbers are written using the SW, AW commands, the sensor
amplifier will reset. The measurement values after settings are applied can be read after (T6 +
T) period processing. By using the read commands (M0, MS) or DRQ input prior to T period
processing, the P.V. values that are read will be (-99.998) (------).
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
Point
Data numbers T
6: Set system parameter request Response time
133: Averaging Response time
Specifications
Performance Specifications
The following table shows the performance specifications for DL-RS1A.
Communication Specifications
The following table shows the communication specifications for DL-RS1A.
Item Specifications
Model DL-RS1A
Power supply voltage
20 to 30 VDC, including 10% ripple (P-P). Class2
(Supplied from the connected IL Series)
Current consumption 25 mA max.
Indicators
2 communication status indicators (green), alarm indicator (red), power indicator
(green)
Environ-
mental
Ambient
temperature
-10 to +55°C (No freezing)
Relative
humidity
35 to 85% RH (No condensation)
Vibration 10 to 55 Hz, compound amplitude 1.5 mm, 2 hours for each of XYZ axes
Material Main unit housing: polycarbonate
Weight Approx. 53 g
Accessories
Instruction manual, 2 end units, expansion connector cover, switch protection
sticker
Item Specifications
Communication method Full duplex
Synchronization method Asynchronous
Transmission code ASCII
Communication speed
(Baud rate)
2400, 4800, 9600, 19200, 38400 bit/s
(Factory default: 9600 bit/s)
Data bit length 7 or 8 bits (Factory default: 8 bits)
Parity check None, even, odd (Factory default: none)
Stop bit length 1 bit
Data delimiter
Receive: automatically detect CR or CR + LF
Send: fixed to CR + LF