Siemens SIMATIC S7-200 System Manual page 205

Example: Last-In-First-Out Instruction
Before execution of LIFO
VW200 0006 TL (max. no. of entries)
VW202 0003 EC (entry count)
VW204 5431 d0 (data 0)
VW206 8942 d1 (data 1)
VW208 1234 d2 (data 2)
VW210 xxxx
VW212 xxxx
VW214 xxxx
S7-200 Instruction Set
Network 1
LD I0.1
LIFO VW200, VW300
VW300
1234
VW200 0006
VW202 0002
VW204 5431
VW206 8942
VW208 xxxx
VW210 xxxx
VW212 xxxx
VW214 xxxx
Chapter 6
After execution of LIFO
TL (max. no. of entries)
EC (entry count)
d0 (data 0)
d1 (data 1)
191