The second section is where the ladder logic is stored. Each command is a byte of data composed of two hexadecimal characters. In the space between 0100 and 01FF there are 256 bytes available for your program. After each set of branches the rung is divided in sets of columns. It is recommended to place a BB after each series of contacts.
Any branch can be true in order for the column to be true.
All columns must be true in order for the rung to be true. It is also recommended to place a CC after each set of branches. The counter and the timer need another byte of information. This is 256 seconds. The second byte for the counter is also in hexadecimal.