Tftp Protocol - Bosch CL400 Manual

8

TFTP Protocol

Addressing of Operands / File system
1070 072 196-101 (00.06) GB
In addition to the BUEP-E communication protocol, the TFTP protocol
(Trivial File Transfer Protocol) is realized on the module, specification ac-
cording to RFC 782 of 1992.
It provides a PC or a Unix computer with a simple possibility of communicat-
ing with the controller. The controller can read data fields of up to 510 bytes.
Bigger fields are not supported. Writing into the data fields is not allowed ei-
ther because of data security reasons.
The controller and the corresponding data fields are interpreted as a file sys-
tem and can be read out by the COM-E module under the corresponding file
name.
<Type of Controller> <Type of Operand> <Operand Offset> <Amount of Op-
erands>
Type of Controller:
CL50 CL500 ZS0
D
CL51 CL500 ZS1
D
CL52 CL500 ZS2
D
CL53 CL500 ZS3
D
CL4 CL400
D
Type of Operand:
I Input
D
O Output
D
M Marker
D
D Data word
D
DF Data field
D
DM Data module
D
Operand Offset:
D From this decimal number on, the data is read in.
Amount of Operands:
L Initial identifier of amount of operands
D
Decimal number with the data amount 0 to 510.
Special case:
D In case of data words, the data module must be specified after the type of
the controller.
Examples:
CL4M6L20
D
CL51DF100L200
D
CL4DM0D0L510
D
CL400, starting at marker 6, 20 bytes
CL500/ZS1, starting at data field 100, 200 bytes
CL400, data module 0, starting at data word 0, 510
bytes
TFTP Protocol 8- -1