KEYENCE N-400 - Manual (Page 107)

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Chapter 5 Multi-Head Mode Control Procedure
5
• Serial communication time (H)
The serial communication time can be obtained from the following formula:
(This formula applies to the case in which an ID number is not added to the data.)
• Next trigger input receiving OFF time (I)
During this time, the BL series does not start operation even when the next trigger
input is turned ON.
When the RS-485 communication baud rate is 38400 bps:
■ When the interference suppression function is used
The timing chart in interference suppression mode is as follows:
• Scan time per unit (L)
The setting of the trigger ON time in interference suppression mode can be
changed to a value in the range of 10 ms to 2550 ms. However, the trigger ON time
in interference suppression mode depends on the setting of the RS-485 communi-
cation baud rate, because the laser ON/OFF command transmission time is re-
quired. Even if the trigger ON time is set to 10 ms, for example, the actual ON time
is approximately 50 ms when the baud rate is set to 38400 bps. (The trigger ON
time for each unit cannot be set to less than 50 ms. )
Serial communication time (H)
Number of data Number of data Number of data
digits: 10 digits: 20 digits: 32
9600 bps 15 ms 27.5 ms 42.5 ms
38400 bps 3.8 ms 6.9 ms 10.7 ms
H =
Number of data + (1: Set Parity) + Start/Stop bit
x
Baud rate
(Number of data digits + Header/Delimiter)
Number of connected BL series Next trigger input receiving OFF time (I)
2 50 ms
5 140 ms
10 290 ms
20 590 ms
31 920 ms
Baud rate
(for RS-232C)
N
L
L
L
M M M M
Trigger input
to N-400
BL series with
ID No. 1
BL series with
ID No. 2
BL series with
ID No. 3