Siemens SIMATIC Ident Function Manual page 28

Parameterizing
3.1 Parameter data block
Variable
ANZ_MDS_present
ANZ_cancel
ANZ_ECC
reserved
LR_bat
battery_low
error
ready
28
Description
Indicates the presence of a transponder in the transmission window of the reader.
ANZ_MDS_present is only indicated when the INPUT parameter MDS_control (see section
"INPUT parameters (Page 21)") was set by the user.
Remember that when an init_run is being executed, the ANZ_MDS_present indication
disappears briefly even when a transponder is permanently located in the transmission
window.
The "cancel" command is not supported by the readers (MOBY U/D, RF200 and RF300).
Not currently used
Not currently used
Not currently used
Not currently used
The battery status of a MOBY U transponder is queried with the MDS-status command.
FB 45 sets this bit if a command is terminated abnormally. The error bit is the checksum error
bit for all errors which occur. The exact cause of the error is stored in the variable error_
MOBY, error_FB or error_BUS (see section "Further displays (Page 29)" or section "Error
messages and troubleshooting (Page 47)"). The error bit is reset when a command is
restarted.
Ready message: error bit = FALSE must be checked after ready = TRUE is signaled. This
ensures that the command was executed normally.
Note:
The ready bit does not need to be set in order to start "init_run".
FB 45 for MOBY U, MOBY D, RF200, RF300
Function Manual, 07/2012, J31069-D0166-U001-A4-7618