Siemens S5-100U User Manual page 220

Simatic s5 programmable controller

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Table 8-28. Overview of Load and Transfer Operations

Loading and Transferring Register Contents

Both accumulators can be addressed as registers. Each register is 16 bits wide. Since the "LIR"

and "TIR" operations transmit data by words, the registers are addressed in pairs.

Loading and transferring register contents are independent of the RLO. The processor goes to

ACCU 1 to get the address of the memory location referenced during data exchange. Conse-

quently, make sure that the desired address is stored in ACCU 1 before this system operation is

EWA 4NEB 812 6120-02

Load the register indirectly

The contents of a memory word are loaded into the specified

Transfer the register indirectly

The contents of the indicated register are transferred to a memory

location. The address is in ACCU 1.

0 (for ACCU 1), 2 (for ACCU 2)

Transfer a data field (byte-by-byte)

A memory area is transferred in the program memory as a field.

End address destination area:

End address source area:

A word is transferred to the system data area.

Load the address 6100

Load the information from the memory location with the address 6100

into ACCU 1.

STEP 5 Operations

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