Siemens SIMATIC S5-95F - Page 396

S5-95F Testing the User Program and Storing It on the Memory Submodule
The ISTACK comprises system data words SD 203 to SD214. Table 14-4 shows which system data
word contains which ISTACK entry.
Table 14-4. ISTACK Entries in System Data Words 203 to 214
System Data Word
(SD)
ISTACK Entry Absolute Address
S5-95F
SD 203 ACCU1 5E96
H
SD 204 ACCU2 5E98
H
SD 205 Instruction register 5E9A
H
SD 206 Step address counter (SAC)
*
5E9C
H
SD 207 Block stack pointer 5E9E
H
SD 208 Data block start address 5EA0
H
SD 209 Nesting depth (0 to 6) and nesting level 5EA2
H
SD 210 2nd and 3rd nesting level 5EA4
H
SD 211 4th and 5th nesting level 5EA6
H
SD 212 6th nesting level 5EA8
H
SD 213 Condition code bits 5EAA
H
SD 214 Interrupt condition code word
(see Figure 14-3)
5EAC
H
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
* Contains the absolute memory address of the next statement to be executed or the block start address of the errored block.
A parameter assignment error is indicated if the SAC points to an address in DB1 (see section 9.1). DB1 is specified as
block in the ISTACK.
Contents of the Interrupt Condition Code Word (UAW)
Figure 14-3. Contents of the Interrupt Condition Code Word
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STOPS
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SUF
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TRAF
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NNN
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STS
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NAU
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ZYK
a a a a a a a
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u
a a a a a a a a
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PEU
a a a a a a a a
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BAU
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a a a a a a a a a
ASPFA
a a a a a
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a a a
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15
a a a a
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14
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13
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12
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11
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10
a a a a a
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8
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7
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6
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5
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4
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3
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2
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1
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0
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u: Unassigned
a a a a a a a a a
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STUEB
a a a a
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SD
214
EWA 4NEB 812 6210-02 14-7