I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
94
5.3.19
$AA5
Description
:
This function reads the reset status of the module. This is the only command that
detects the module hardware watchdog failure. If the module is malfunction, the module
hardware watchdog circuit will reset the module. This reset will cause the output state of
the module to return to its start-up values. The start-up values may be different from the
output values in use prior to the module reset. Therefore, an output command needs to
be resent to the module in order to maintain the same output state once the module
hardware watchdog circuit reset the module.
Syntax
:
$AA5[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled
no [chk]
(CrLf)
End Character
Response
: valid command
!AAS[chk](CrLf)
invalid command
?AA[chk](CrLf)
no response
syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S = 0
the module has not been reset since the last reset status was read
S = 1
the module has been reset since the last reset status was read
[chk]
2-character checksum. If the checksum is disabled
no [chk]
(CrLf)
End Character
Example
: (Assume the AA address value of the I-7521 module is 01)
command: $015(CrLf)
response: !011(CrLf)
command: $015(CrLf)
response: !010(CrLf)
command: $015(CrLf)
response: !011(CrLf)
It is first time power-on reset
The reset status is normal
This module has been
reset
by the module
Hardware watchdog. Therefore all output
will be returned to its initial
start values
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527
Summary of Contents for I-7521
Page 11: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 11 1 4 Pin Assignment...
Page 13: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 13...
Page 15: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 15...
Page 17: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 17...
Page 19: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 19...
Page 21: ...I 7521 I 7522 I 7522A I 7523 I 7524 I 7527 User s Manual Ver2 5 Aug 2015 21...
