
Special Memory (SM) Bits
C-16
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Table C-18 Special Memory Bytes SMB130 to SMB165
SM Byte Description
SM156.0 to
SM156.4
Reserved
SM156.5 HSC5 current counting direction status bit: 1 = counting up
SM156.6 HSC5 current value equals preset value status bit: 1 = equal
SM156.7 HSC5 current value is greater than preset value status bit: 1 = greater than
SM157.0 to
SM157.2
Reserved
SM157.3 HSC5 direction control bit: 1 = count up
SM157.4 HSC5 update direction: 1 = update direction
SM157.5 HSC5 update preset value: 1 = write new preset value to HSC5 preset
SM157.6 HSC5 update current value: 1 = write new current value to HSC5 current
SM157.7 HSC5 enable bit: 1 = enable
SMB158 to
SMB161
HSC5 new current value: SM158 is most significant byte and SM161 is
least significant byte
SMB162 to
SMB165
HSC5 new preset value: SM162 is most significant byte and SM165 is least
significant byte
SMB166 to SMB194: PTO0, PT1 Profile Definition Table
As described in Table C-19, SMB166 through SMB194 are used to show the
number of active profile steps and the address of the profile table in V memory.
Table C-19 Special Memory Bytes SMB166 to SMB194
SM Byte
Description
SMB166 Current entry number of the active profile step for PTO0
SMB167 Reserved
SMB168
SMB169
V memory address of the profile table for PTO0 given as an offset from V0.
SM168 is the most significant byte of the address offset
SMB170 to
SMB175
Reserved
SMB176 Current entry number of the active profile step for PTO1
SMB177 Reserved
SMB178 to
SMB179
V memory address of the profile table for PTO1 given as an offset from V0.
SM178 is the most significant byte of the address offset
SMB180 to
SMB194
Reserved
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