Siemens SIMATIC S7-1500 System Manual page 134

Offset from Parameter
start address
Byte 48 to 51 TEC_IN_EXT (DI5)
Byte 52 to 55 TEC_IN (DI6)
Byte 56 to 59 TEC_IN_EXT (DI6)
Byte 60 to 63 TEC_IN (DI7)
Byte 64 to 67 TEC_IN_EXT (DI7)
Byte 68 LEC (DI0, DI1)
Byte 69 LEC (DI2, DI3)
Byte 70 LEC (DI4, DI5)
Byte 71 LEC (DI6, DI6)
Byte 72 Reserved
Byte 73 Layout property
Byte 74, 75 ZSW
Substitute value behavior
If the CPU is in STOP, the digital outputs (irrespective of any inversion set) return "0" (LOW
level) as a substitute value.
SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA
Meaning
Bit 4 to 6: Lost Edge Counter for DI1
Bit 0 to 2: Lost Edge Counter for DI0
Bit 3, 7: Reserved (must not be used)
Bit 4 to 6: Lost Edge Counter for DI3
Bit 0 to 2: Lost Edge Counter for DI2
Bit 3, 7: Reserved (must not be used)
Bit 4 to 6: Lost Edge Counter for DI5
Bit 0 to 2: Lost Edge Counter for DI4
Bit 3, 7: Reserved (must not be used)
Bit 4 to 6: Lost Edge Counter for DI7
Bit 0 to 2: Lost Edge Counter for DI6
Bit 3, 7: Reserved (must not be used)
Must not be used
Specific value
SSL Bit 12 to 15: Sign of life counter (slave sign of life)
--- Bit 10, 11: Reserved (must not be used)
SYNC Bit 8: X142 interface is synchronized with user program
Channel address Bit 4 to 7 and 9: Number of the respective DI or DQ
Channel mode Bit 0 to 3: Operating mode of the respective DI or DQ
7.9 Configuration of digital inputs/outputs (X142)
Configuring
133