Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Changes and modifications
Document revisions
Required setting of the 1770-KF3 device
The protocol Allen-Bradley DF1 Full Duplex supports communication with Allen-Bradley devices of the SLC-500 series. Communication supports (is verified) for the following devices:
Table 1
Device type | Meaning | Protocol version |
---|---|---|
Allen-Bradley SLC 5/04 | Communication with RS232 via the SLC 5/04 CPU port | - |
Allen-Bradley 1770-KF3 | DH-485 bus concentrator, supports communication with all the devices of the SLC-500 series (description of setting is mentioned at the end of chapter). | - |
Configuration dialog box - tab
Parameters, select the protocol Allen-Bradley DF1 Full Duplex.
They influence some optional parameters of protocol.
Table 2
Parameter | Meaning | Unit | Default value |
---|---|---|---|
BCC/CRC Checksum | Type of security by check sum. | CRC BCC |
CRC |
Full Debug | Activates detailed listings about sending and receiving values. | YES/NO | NO |
Communication protocol: Allen-Bradley DF1
Station address: DH-485 Node Address of device in the range of 1 up to 31.
Communication station - configuration
dialog box - the Protocol parameter input field.
They influence some optional parameters of protocol.
Table 3
Parameter | Meaning | Unit | Default value |
---|---|---|---|
Interface Node | DH-485 Node Address of the communication interface(KF3), the address in common use is 0. (Warning, when you use the 1770-KF3 device, its setting is valid for all stations of the line). | - | 0 |
Wait First Timeout | First timeout for reading a response after sending a message. | ms | 100 |
Wait Timeout | Timeout between response readings till its finalization. | ms | 100 |
Max Wait Retry | Repetition number of response readings till its finalization. | - | 40 |
Max Read Retry | Repetition number of response readings, if received response is not the response to expected transaction. All received messages are to be confirmed. | - | 10 |
Retry Count | Retry count of the request in case of a communication failure. | - | 3 |
Block Read | Enables block data read. It is executed by non-documented functions - proceed carefully. | YES/NO | NO |
Max. Block Length | Maximum block length for block read (in bytes). Value must be a even number within the range of 2 up to 254. | - | 40 |
Possible I/O tag types: Ai, Ao, Ci, Co, Di, Dout.
I/O tag address is an address in text form in the SLC-500 form. Address format is:
[$] X [file] : element [.field] [/bit]
in which
$ | optional character, |
X | file type identifier (required - see the table nr. 3), |
file | file number (optional, if not defined, there will be used the default file number according to the table nr. 3), |
element | number of element in the file (required), |
.field | sub-element number (optional, used for Output, Input files only), |
/bit | bit number (optional, must be within the range of 0..15). |
Table 4
X | File Type | Default file number |
---|---|---|
O | Output | 0 |
I | Input | 1 |
S | Status | 2 |
B | Binary | 3 |
N | Integer | 7 |
F | Float | 8 |
[$]O[n]:e[.s][/b]
"n" file number - if there is used other than the default number of 0,
"e" element number in the file,
"s" sub-element number (0..255),
"b" bit number (0..15).
For example:
O:2 $O0:2/0 O:1.0/1
Note: You cannot write into Output files, only read data.
[$]I[n]:e[.s][/b]
"n" file number - if there is used other than the default number of
1,
"e" element number in the file,
"s" sub-element number (0..255),
"b" bit number (0..15).
For example:
I:1 $I1:2/0 I:2.0/15
Note: You cannot write into Input files, only read data.
[$]S[n]:e[/b]
"n" file number - if there is used other than the default number of
2,
"e" element number in the file,
"b" bit number (0..15).
For example:
S:0 $S2:40 S:2/15
Note: You cannot write bit-by-bit into Status type files (output I/O tags with the parameter [/b]).
[$]B[n]:e[/b]
"n" file number - if there is used other than the default number of
3,
"e" element number in the file,
"b" bit number (0..15).
For example:
B:2 $B3:0 B3:2/1
[$]N[n]:e[/b]
"n" file number - if there is used other than the default number of
7,
"e" element number in the file,
"b" bit number (0..15).
For example:
N7:2 $N:0 N27:0/1
[$]F[n]:e
"n" file number - if there is used other than the default number of
7,
"e" element number in the file.
For example:
F:0 $F8:0 F29:1
Further required parameters for 1770-KF3 device:
-