Siemens SIMATIC S7-200 System Manual page 502

S7-200 Programmable Controller System Manual
Table D-14 Special Memory Bytes SMB36 to SMD62
SM Byte
SM36.0 to SM36.4
SM36.5
SM36.6
SM36.7
SM37.0
SM37.1
SM37.2
SM37.3
SM37.4
SM37.5
SM37.6
SM37.7
SMD38
SMD42
SM46.0 to SM46.4
SM46.5
SM46.6
SM46.7
SM47.0
SM47.1
SM47.2
SM47.3
SM47.4
SM47.5
SM47.6
SM47.7
SMD48
SMD52
SM56.0 to SM56.4
SM56.5
SM56.6
SM56.7
SM57.0
SM57.1
SM57.2
SM57.3
SM57.4
SM57.5
SM57.6
SM57.7
SMD58
SMD62
488
Description
Reserved
HSC0 current counting direction status bit: 1 = counting up
HSC0 current value equals preset value status bit: 1 = equal
HSC0 current value is greater than preset value status bit: 1 = greater than
Active level control bit for Reset: 0= Reset is active high, 1 = Reset is active low
Reserved
Counting rate selection for quadrature counters:0=4x counting rate; 1=1 x counting rate
HSC0 direction control bit: 1 = count up
HSC0 update the direction: 1 = update direction
HSC0 update the preset value: 1 = write new preset value to HSC0 preset
HSC0 update the current value: 1 = write new current value to HSC0 current
HSC0 enable bit: 1 = enable
HSC0 new current value
HSC0 new preset value
Reserved
HSC1 current counting direction status bit: 1 = counting up
HSC1 current value equals preset value status bit: 1 = equal
HSC1 current value is greater than preset value status bit: 1 = greater than
HSC1 active level control bit for reset: 0 = active high, 1 = active low
HSC1 active level control bit for start: 0 = active high, 1 = active low
HSC1 quadrature counter rate selection: 0 = 4x rate, 1 = 1x rate
HSC1 direction control bit: 1 = count up
HSC1 update the direction: 1 = update direction
HSC1 update the preset value: 1 = write new preset value to HSC1 preset
HSC1 update the current value: 1 = write new current value to HSC1 current
HSC1 enable bit: 1 = enable
HSC1 new current value
HSC1 new preset value
Reserved
HSC2 current counting direction status bit: 1 = counting up
HSC2 current value equals preset value status bit: 1 = equal
HSC2 current value is greater than preset value status bit: 1 = greater than
HSC2 active level control bit for reset: 0 = active high, 1 = active low
HSC2 active level control bit for start: 0 = active high, 1 = active low
HSC2 quadrature counter rate selection: 0 = 4x rate, 1 = 1x rate
HSC2 direction control bit: 1 = count up
HSC2 update the direction: 1 = update direction
HSC2 update the preset value: 1 = write new preset value to HSC2 preset
HSC2 update the current value: 1 = write new current value to HSC2 current
HSC2 enable bit: 1 = enable
HSC2 new current value
HSC2 new preset value