public static S7AlarmIndicationDatagram TranslateFromMemory(Memory <byte> data)
{
var current = new S7AlarmIndicationDatagram
{
UserData = S7UserDataDatagram.TranslateFromMemory(data),
};
current.AlarmMessage = S7AlarmMessage.TranslateFromMemory(current.UserData.Data.Data, (AlarmMessageType)current.UserData.Parameter.SubFunction);
return(current);
}
public static S7AlarmMessage TranslateFromMemory(Memory <byte> data, AlarmMessageType subfunction)
{
var span = data.Span;
var current = new S7AlarmMessage();
var offset = 0;
current.Timestamp = GetDt(span.Slice(offset)); offset += 8;
current.FunctionIdentifier = span[offset++];
current.NumberOfMessages = span[offset++];
var alarms = new List <S7PlcAlarmItemDatagram>();
for (var i = 0; i < current.NumberOfMessages; i++)
{
var alarm = new S7PlcAlarmItemDatagram
{
AlarmType = subfunction
};
//var varspec = span[offset];
offset++;
alarm.Length = span[offset++];
if (alarm.Length > 0)
{
var syntaxId = span[offset++];
switch (syntaxId)
{
case (byte)SyntaxIds.AlarmInd:
case (byte)SyntaxIds.AlarmAck:
{
//var numberOfAssociatedValues = span[offset];
offset++;
alarm.MsgNumber = BinaryPrimitives.ReadUInt32BigEndian(span.Slice(offset, 4));
offset += 2; // 2 is correct, we use the offset twice
alarm.Id = BinaryPrimitives.ReadUInt16BigEndian(span.Slice(offset, 2));
offset += 2;
switch (subfunction)
{
case AlarmMessageType.AlarmSQ: // ALARM_SQ
case AlarmMessageType.AlarmS: // ALARM_S
{
alarm.EventState = span[offset++]; // 0x00 == going 0x01 == coming
alarm.State = span[offset++]; // isAck
alarm.AckStateGoing = span[offset++];
alarm.AckStateComing = span[offset++]; // 0x00 == no ack 0x01 == ack
var details = new S7PlcAlarmDetails {
Timestamp = current.Timestamp
};
S7PlcAlarmDetails.ExtractAssotiatedValue(ref span, ref offset, details);
if (alarm.EventState == 0x00)
{
alarm.Going = details;
}
else if (alarm.EventState == 0x01)
{
alarm.Coming = details;
}
}
break;
case AlarmMessageType.AlarmAck: // ALARM ack
{
alarm.AckStateGoing = span[offset++];
alarm.AckStateComing = span[offset++]; // 0x00 == no ack 0x01 == ack
}
break;
default:
{
ThrowHelper.ThrowUnknownAlarmSubfunction(subfunction);
break;
}
}
break;
}
default:
{
ThrowHelper.ThrowUnknownAlarmSyntax(syntaxId);
break;
}
}
}
alarms.Add(alarm);
}
current.Alarms = alarms;
return(current);
}