Siemens SIMATIC S7 System Manual page 117

Example: Symbolic address and symbolic number assignment
Example: Alternate binary entry methods and resultant binary assignment
You can enter values of 1 or 0 for binary assignments, or "true", "false", "on" or "off" (in either
lower, upper, or mixed case). The data block editor interprets your entry and shows the
resultant binary assignment.
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
Programming concepts
5.4 Data block (DB) editor
117