User Manual DEV 1951
86 Copyright DEV Systemtechnik GmbH 2004-2017
5.6.3 Sandar Prosan Commands
The different commands for the communication with the device are described next.
5.6.3.1 Status Query (Q)
The status query can be sent at any time to the device
<STX>Q<checksum><ETX> i.e. <STX>Q51<ETX>
The device answer is
<ACK><STX>Q<status_byte><checksum><ETX> e.g. <ACK><STX>Q00B1<ETX>
with the following possible content of the <status_byte>:
00 = Status ok in Remote/Auto Mode
01 = Pending event(s) in Remote/Auto Mode
10 = Status ok in Local Mode
11 = Pending event(s) in Local Mode
5.6.3.2 Query Alarm Messages (AM or AMA)
This is the command for the query of pending events
<STX>AM<checksum><ETX> i.e. <STX>AM8E<ETX>
or
<STX>AMA<checksum><ETX> i.e. <STX>AMACF<ETX>
The device answer is
<ACK><STX>AM001:0000,e{,x
1
,…,x
e
}<checksum><ETX>
or
<ACK><STX>AMA001:0000,e{,x
1
,…,x
e
}<checksum><ETX>
with:
e = 00…99 number of events following
{,x
1
,…,x
e
}
= 00…FF if there are events: error code class (first digit) and
error code sub-class (second digit) in hexadecimal (!) notation,
separated by commas (",")
e.g. <ACK><STX>AM001:0000,00A5<ETX> (no events)
or <ACK><STX>AMA001:0000,01,1377<ETX> (power supply event(s))
Note:
The type of event is indicated via the upper two hexadecimal digits of the
related error class. The first digit specifies the error class according to
chapter 5.9.4.4.2; the second digit defines the sub-class. The event(s) of the
second example are in the error class "1", i.e. this denotes events in the area of
the power supplies, please refer to chapter 6.2.1. The sub-class of the indicated
event (x
1
= 13) is "3", specifying a "Power Supply" event.
It is not indicated if there is more than one pending and not acknowledged
event of the same error code class/sub-class.
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