Lenze Global Drive PLC Developer Studio User Manual download pdf (Page 118)

Drive PLC

Appendix

8−38

DrivePLC DE 6.0

8.6.1 Temporary codes

Codes C2500 and C2501 are temporary codes, i.e. the data

 does not occupy any EEPROM memory space.

 cannot be saved in the parameter set of the unit using C0003 = 1.

 will be lost after mains disconnection or power failure.

 is fixedly linked with the PLC flag area.

 Temporary codes should be used for parameters which are only accessed during a switch−on

cycle of the PLC.

 The temporary codes can also be used to directly access the flag area of the PLC (e.g via

HMI) without having to create a variable.

8.6.2 RAM access via codes

If you want to access the RAM of the PLC from external control systems or PC tools, for instance to

manipulate motion profile data online, you can use the following codes:

RAM

block 1

RAM block selection

C0506

Offset

C0505

4 bytes

Offset

C0505

RAM

block 2

write

read

4 bytes

C0507

4 bytes

C0508

65535

Write protection

C0504/1

Write protection

C0504/2

Fig. 8−1 Codes for RAM access

1 2 ... 113 114 115 116 117 118 119 120 121 122 123 ... 128 129

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Lenze Global Drive PLC Developer Studio User Manual Page 118