The READ_PCMCIA function transfers data from the user memory card archiving zone to the PLC RAM memory. The function READ_U_PCMCIA enables to address the PLC zone's beginning to be copied to the PCMCIA card up to 65 535 (instead of 32 767 for READ_PCMCIA function) and is therefore recommended to be used instead of READ_PCMCIA function.
The additional parameters and can be configured.
Representation:
Representation:
Representation:
LD Slot_Number
READ_PCMCIA Source_Address, Words_Number, Dest_Address, Read_State
Representation:
READ_PCMCIA(Slot_Number, Source_Address, Words_Number, Dest_Address, Read_State);
Description of the parameters
The following table describes the input parameters:
|
Parameter
|
Type
|
Comment
|
|
Slot_Number
|
|
PCMCIA card slot:
-
0 = upper slot,
-
1 = lower slot
|
|
Source_Address
|
|
First address where the data is read from the memory card (0...).
|
|
Words_Number
|
|
Number of words to be read.
|
|
Dest_Address
|
|
First address where the data is written in the PLC (%MW). The upper limit of the address is: 32 767.
|
The following table describes the output parameters:
|
Parameter
|
Type
|
Comment
|
|
Read_State
|
|
Code providing the result of the read command's execution:
-
16#0000: read performed correctly,
-
16#0102: Dest_Address + Words_Number -1 is greater than the maximum number of declared words in the PLC.
-
16#0104: no valid application or no word in the PLC,
-
16#0201: no file zone in the memory card,
-
16#0202: memory card error,
-
16#0204: memory card write-protected,
-
16#0241: Source_Address < 0,
-
16#0242: Dest_Address + Words_Number-1 is greater than the highest address of the memory card,
-
16#0401: Words_Number = 0,
-
16#0402: Slot_Number is different from 0 and 1.
-
16#0501: Words_Number = unsupported service.
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