Graco ProMix PD3K Plus, Операция

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Operation Using a Programmable Logic Controller (PLC)
Read Read Read Alarm Alarm Alarm Info Info Info
The Read Alarm Info command allows remote access to any of the last 200 alarms logged by the ProMix PD3K+. The
argument is the
chronological index
of the alarm log, where 0 is the most recent alarm and 199 is the 200 th most recent.
The date is returned as a four-byte packet with each byte holding a two-digit value for (from MSB to LSB) year, month,
day, and day of the week (Monday = 01).
The time is returned as a three-byte packet with each byte holding a two-digit value. Starting from the MSB, the first
byte can be ignored, then hour, minute, and second.
The alarm code is a four-character little endian ASCII string
See System Errors, page 97 , for more details on these Event Types.
An example decoding algorithm is provided below.
Example: Read back the second most recent alarm, which was a Position Pump 1 (DK01) recorded on Tuesday
June 3, 2014 at 8:11 AM.
DCS DCS DCS Register Register Register Parameter Parameter Parameter Description Description Description Data Data Data
Type
Type Type
Units Units Units Value Value Value Range Range Range
DCS
Command Read Alarm Info uint32 NONE 14 0 - 19
Argument 0 Alarm Index uint32 NONE 1 0 - 199
Acknowledge Command Acknowledged uint32 NONE 2 = ACK 0 - 4
Return 0 Alarm Date uint32 [YY:MM:DD:DW] 0x0E060302 =
[14:06:03:02] N/A
Return 1 Alarm Time uint32 [xx:HH:MM:SS] 0x080B0B =
[08:11:11] N/A
Return 2 Alarm Code Char[3:0] uint32 NONE 0x31304B44 = [‘1’,
’0’, ’K’, ’D’] N/A
Example Example Example ASCII ASCII ASCII Character Character Character String String String Decode Decode Decode Algorithm: Algorithm: Algorithm:
character_str[0] = Return_2 & 0xFF;
character_str[1] = (Return_2 >> 8) & 0xFF;
character_str[2] = (Return_2 >> 16) & 0xFF;
character_str[3] = (Return_2 >> 24) & 0xFF;
character_str[4] = ‘\0’;
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