ICP DAS USA I-7521, User Manual

Page: 42 / 148

I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
42
RS-232 device
Ensure that the command arrives in position “3”.
3
Response time : The period of
time between when the RS-232
device receives a command and
sends a response.
Response time< timeout1?
The response is stored
in the RS-232 COM
Port buffer (Refer to
command “$AAU”)
Stop receiving and start to send
response characters to COM2.
command bypass status
: OFF
Receive an
end-character to finish
the receiving operation?
(remove the
end-character from the
command)
Bypass or not?
(delimiter)AA(bypa
ss), see Sec. 5.3.10
RS-232 COM Port:
1. CrLfmode=0~3

suffix end character to
the command.
CrLfmode=4

do not
suffix any character to
the command.
2. “
command bypass
status
”:
ON .
Wait for timeout0 to
elapse without
receiving any further
data in order to
determine the end of
the command?
Receive one character as
part of a response.
time < timeout2?
time:
between receiving a
new character and
receiving the last
character
COM 2:
CrLfmode=0~3

suffix the
end character to the response.
CrLfmode=4

do not suffix
any characters to the response.
end-character Received?
Receive a character as
part of a response.
(remove the end
character from the
response)
time>timeout2? and
timeout1 has elapsed?
time: between
receiving a new
character and receiving
the last character.
“command bypass status”
ON or OFF ?
RS-232 COM Ports
COM2
crlfmode=4 (default)
crlfmode=0~3
No
Yes
Yes
Yes
Yes
No No
Yes
crlfmode=0~3
crlfmode=4(default)
No
ON
OFF
Yes
Yes
No
1. Each RS-232 COM Port has its own CrLfmode, timeout1,
timeout2. (RS-485 COM2 only has CrLfmode, timeout0)
2. Command:
Response:
I-752N