Input
Try:
Representations
Denary
—
Binary (nibbles)
—
Octal
—
Hexadecimal
—
Bit pattern (MSB on left — click any bit to toggle it)
BCD (4 bits per decimal digit — note this differs from pure binary)
Why this matters
PLC tags arrive in different bases depending on the device. Ladder logic uses bits, analog cards return raw integers, HMI displays read BCD, and memory addresses are typically printed in hex or octal. Fluency in converting between them is mandatory.
Watch the difference between 100 dec →
0110 0100 in binary but 0001 0000 0000 in BCD.
That's why thumbwheel switches and 7-segment displays use BCD: each
decimal digit gets its own nibble.