Ingersoll-Rand CENTAC, Техническое справочное руководство

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CMC TECHNICAL REFERENCE MANUAL
1X36003 Version 2.52

1996-1999 Ingersoll-Rand Company
Date of Issue: 18-Oct-1999
123
Example: Reading a Discrete Value
Reading discrete values from file number 11 or higher is the same as reading analog data.
To read a digital output (Channel 3, 188h) as a two-byte integer, the following command is
sent:
DLE STX DST SRC CMD STS TNS FN
C
Packet
Offset Total
Trans
PLC5 System Address Size DLE ETX BCC
10 02 0D 11 0F 00 A1 C2 68 00 00 01 00 07 00 0B BC 01 00 10 03 38
The response to this command is:
DLE STX DST SRC CMD STS TNS A B DLE ETX BCC
10 02 11 0D 4F 00 A1 C2 99 09 03 42 01 00 10 03 48
Example: Reading Multiple Discrete Values
To read digital output channels 1-6 as integers, the following command is sent:
DLE STX DST SRC CMD STS TNS FN
C
Packet
Offset Total
Trans
PLC5 System Address Size DLE ETX BCC
10 02 0D 11 0F 00 41 17 68 00 00 0C 00 07 00 0B BA 0C 00 10 03 2F
The response to this command is:
DLE STX DST SRC CMD STS TNS A B
10 02 11 0D 4F 00 41 17 99 09 19 42 00 00 00 00 00 00 00 00 01 00 00 00
B DLE ETX BCC
00 00 00 00 00 00 00 00 00 00 00 00 10 03 3D
Example: Reading Bit-Packed Discrete Data
Reading discrete values from file number 10 is to read the 16 bit-packed discrete values in a
two-byte integer format. When the following command is sent,
DLE STX DST SRC CMD STS TNS FN
C
Packet
Offset Total
Trans
PLC5 System Address Size DLE ETX BCC
10 02 0D 11 0F 00 61 C4 68 00 00 01 00 07 00 0A 0B 01 00 10 03 28
the response from this command is:
DLE STX DST SRC CMD STS TNS A B DLE ETX BCC
10 02 11 0D 4F 00 61 C4 99 09 03 42 28 10 10 10 03 4F
NOTE
The data value 10h in field B is transmitted as 10h 10h to be distinguished from the
control character DLE. Please see the
DF1 Full-Duplex Protocol Message Frames
section for more details.
In the above example, the local data file type can be either bit or integer types. Local data
element B10:11 covers CMC data table address 176-191. Bit 10-15 is for digital output
channels 1-6. You can determine the remote trouble contact (Channel 3, J15-P3,4) by bit 12
in the returned integer. The table below graphically depicts the individual bit value for the
returned two-byte integer.