Industry Automation and Drive Technologies - SCE
Control bits from Bit0 to Bit7
Variable | Description |
|
|
cancel | True =interruption of a current command or a command string. FB45 then sets the |
| variable ready. |
| MOBY U/D or RF300: the variable ‘cancel’ is not available. A command has to be |
| canceled with the variable init_run. |
command_start | True = start of a command or a command string |
repeat_ command | True = command repetition: The command or command chain stored last in the IM is |
| reprocessed with the next MDS. However, command processing for the MDS is |
| started only after the MDS that was processed has exited the transmission window |
| (ANZ_MDS_present= 0) and a new MDS has entered the transmission window of the |
| reader (ANZ_MDS_present: 0 → 1). |
| False = no command repetition, or command repetition is stopped after the command |
| that was started with the repeat command is processed. Please note that the user |
| has to reset this bit in order to stop command repetition. The result of the command |
| repetition is fetched by the use setting command_start. |
| Repeat_command is not reset automatically by FB45 after the command is |
| processed. |
| The commands init_run and cancel reset the variable repeat_command. This also |
| interrupts a command repetition in the IM. repeat_command can be set again by the |
| application with the next command_start. Handling of command repetition is described |
| in the chapter "Command Repetition“. |
Init_run | True = IM restart. In this case, FB45 is also reset and the IM |
| data and commands in the IM are lost. This bit has to be set in the restart OB (OB100) |
| for each MOBY channel or IM. |
| After a |
| then has to perform an init_run. |
| Please note: |
| • When loading a parameter data block from the programming device to the |
| SIMATIC, bit init_run is |
| execution of an IM restart. |
| • The time to execute init_run is normally in the millisecond range. If there is |
| an error, this time may extend to 15s. |
IM_failure | True = the IM failed. The user sets this bit in OB122 (refer to chapter "Programming |
| Module Failure“). FB45 then signals an error to the user (error_FB = 09) and |
| interrupts the current command. If the user does not program OB122, the PLC enters |
| the STOP mode if the IM fails. |
FB45_active | FB45 is just processing a command. This variable is set when the command is started |
| (command_start=True) and remains active until |
| • FB45 has received the last acknowledgement from the IM |
| • The init_run bit was set |
| • The cancel bit was set |
| • The IM signaled an error |
ANZ_next | This bit is set if the command executed last was a NEXT command |
ANZ_reset | This bit indicates that the command executed last was a RESET. The user started the |
| RESET command with "init_run“. |
Notes
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TIA Training Document | Page 47 of 65 |
Module E11 |
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Status: 01/2010 | Radio Frequency Identification (RFID) with SIMATIC |
RF180C |
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