User guide

Software
64
890 USE 108 00 August 2001
Description of
the DLOG
Instruction Block
(E984-275/285
Only)
The DLOG (data logging) block allows state RAM data to be recorded into the
memory of a PCMCIA card using ladder logic.
The DLOG (data logging) block has the following characteristics:
The size is three nodes high
The PLC compatibility is PC-E984-275, and PC-E984-285.
The opcode is 56 hex
Note: Each segment in the PCMCIA card MUST be erased before any locations,
in the segment, are written, this is necessary because the PCMCIA driver does not
allow 0 bits in the card to be changed to 1 bits via a write command. Only an erase
can make this change.