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The Parameter Data Block
Table 3-3
Variables in BEST
Variable
command_start
init_run
ASM_failure
FC56_active
ANZ_next
ANZ_reset
ANZ_MDS_present
ANZ_DIR_change
3-8
True = Starts a command
True = New start of the interface module. The FC 56 is reset and the ASM is
parameterized again. All data and commands on the ASM are lost. This
bit must be set in the new start OB (OB 100) for every MOBY channel
or ASM.
FC 56 automatically performs an init_run after a failure of the
MOBY-ASM. The error error_MOBY = 0F is reported to the user.
Remember:
When a parameter data block is transferred from the programmer
to the SIMATIC, the init_run bit is preset with TRUE. This causes an
automatic new start for the ASM.
True = The ASM has failed. This bit is set by the user in OB 122 (see
chapter 5.4). FC 56 then reports an error (error_code = H1 35) to the
user and interrupts a running command.
If OB 122 is not programmed by the user, the PLC assumes the
STOP state when an ASM fails.
FC 56 is processing a command. This variable is set when the command starts
(command_start = true) and remains active until:
S
FC 56 has received the last acknowledgment from ASM.
S
The Cancel bit was set.
S
An error message was reported from the ASM.
This bit is set when the last command executed was a NEXT command.
This bit indicates that the last command executed was a RESET command. The
RESET command was started by the user with "init_run."
Indicates the presence of at least one MDS in the SLG's transmission window.
Remember that when an init_run is being executed, the ANZ_MDS_present
indication disappears briefly when an MDS is permanently located in the
transmission window.
Directory change
The checksums of the filehandler and those of the MDS to be processed are not
identical. The filehandler had to read the entire directory and FAT of the MDS
before executing the parameterized command. This increases command
execution time accordingly (see also BIT 14 = error).
Description
J31069-D0155-U001-A0-7618
FC 56
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