Micromod Micro-DCI: 53MT6000 Micro-Tools - Manual (Page 96)

53MT6000 INSTRUCTION MANUAL
80 Database Editor
There are restrictions on the maximum number of L & C type data that can be read. Refer to the PLC
Instruction Manual for details.
Words of L to Read: Beginning with the Starting memory address, this is the number of
Logical data words to be accessed from the PLC. Logical data from
the PLC is read as words of data and stored in the controller’s
database as "L" type data. Individual L data values can then be
accessed by the controller. If no Logical type data is to be read, this
value should be set to zero. [DDIA = B667, DDIB = B643]
Words of C to Read: Immediately following the Logical words of data, the floating-point
words of data are read. Floating point or integer data from the PLC
is read as words of data and stored in the controller’s database as
"C" type data. If no floating-point or integer data is to be read, this
value should be set to zero. [DDIA = B668, DDIB = B644]
Write Command: This selection is used to tell the PLC the type of write to perform.
There are two supported options. [DDIA = B679, DDOB = B655]
0 = Protected Write
8 = Unprotected Write
PLC Error - Read: This Error Code is the reply status from the PLC that is not
associated with communications. Here the error code is reported as
a decimal number. The PLC manual may report these in
hexadecimal. [DDIA = B671, DDIB = B647]
255 = no reply
00 = successful - no error
Comm Error - Read: This Error Code is used to report a message related to the
communication message. [DDIA = B672, DDIB = B648]
0 = no errors
251 = 53MC5000 hardware malfunction
252 = 53MC5000 hardware malfunction
253 = bad message, a bad message indicates that errors were
found in the predictable portion of the message
254 = bad checksum, the message frame is not properly
formatted
255 = timeout error, no message came back from the PLC
Comm Error Count -
Read: This is a running total of the non-zero PLC Error codes and non-
zero Communications Error codes. DDIA = B673, DDIB = B649]
Unit Address - Write: This is the address of the PLC to be accessed. [DDIA = B674, DDIB
= B650]
Starting Memory
Address - Write: This is the beginning memory address for writing data to the PLC.
All subsequent write memory locations are referenced from the
starting location as contiguous words of data. The written data is
mapped from the controller database into the PLC in exactly the
same order. This is a decimal number that is converted and stored
as two bytes in the controller database. [DDIA = B675 &B676, DDIB
= B651 & B652]
ENTRY EXPLANATION