YASKAWA VIPA SPEED7 - File Functions SPEED7 Cpus

16.3 File Functions SPEED7 CPUs
16.3.1 FC/SFC 195 and FC/SFC 208...215 - Memory card access
The FC/SFC 195 and FC/SFC 208 ... FC/SFC 215 allow you to include the memory card
access into your user application. The following parameters are necessary for the usage
of the FC/SFCs:
The access takes place via a HANDLE number. That is assigned to a FILENAME via a
call of the FC/SFC 208 FILE_OPN res. FC/SFC 209 FILE_CRE. At the same time a max.
of 4 HANDLE may be opened (0 ... 3). To close an opened file call the FC/SFC 210
FILE_CLO and thus release the HANDLE again.
As media format set 0 for the MMC. Other formats are not supported at this time.
Read and write start with the position of a write/read flag. After opening res. creation of a
file, the write/read flag is at position 0. With FC/SFC 213 FILE_SEK you may shift the
write/read flag from an ORIGIN position for an OFFSET (number Bytes).
n With REQ = 1 you activate the according function.
n REQ = 0 returns the current state of a function via RETVAL.
n BUSY = 1 monitors that the according function is in process.
After the execution of a function RETVAL returns a number code:
RETVAL = 0: Function has been executed without errors.
0 < RETVAL < 7000h: RETVAL = Length of the transferred data (only FC/SFC 211 and FC/SFC 212).
7000h ≤ RETVAL < 8000h: Monitors the execution state of the function.
RETVAL ≥ 8000h: Indicates an error that is described more detailed in the according FC/SFC.
CAUTION!
For the access of the memory card you must regard the following hints.
Nonobservance may cause data loss at the memory card:
– A max. of 4 Handle (0 ... 3) may be used at the same time!
– File names must follow the 8.3 format or special character!
– These FC/SFCs only gives you access to the top directory level (Root
directory) of the memory card!
– You may only rename or delete files that you've closed before with
FC/SFCs 210 FILE_CLO!
Overview
HANDLE, FILENAME
MEDIA
ORIGIN, OFFSET
REQ, BUSY
RETVAL
VIPA SPEED7
System Blocks
File Functions SPEED7 CPUs > FC/SFC 195 and FC/SFC 208...215 - Memory card access
HB00 | OPL_SP7 | Operation list | en | 18-30 910