Micromod Micro-DCI: 53MT6000 Micro-Tools - Manual (Page 110)

53MT6000 INSTRUCTION MANUAL
94 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.
Set UP: This designates the data format transfer protocol. Clicking on the
"down arrow" reveals a list of three selections, these are [DDIA =
B293, DDIB = B459]:
8, 1, NO
8, 1, EVEN
8, 1, ODD
Set Up Error: This index number refers to a problem with the read or write setup
parameters [DDIA = B684, DDIB = B660]. These errors cause DDI
operation to halt.
0 = No error
1 = L-words to read greater then 64
2 = C-words to read greater than 64
3 = L-words to write greater than 64
4 = C-words to write greater than 64
5 = Invalid Function Code
6 =
Total bytes to read greater than 128 (command 1 or 2)
7 = Total bytes to write greater than 128 (command 1 or 2)
8 = Specifying C-words in commands 3, 4, 5 or 6
9 = L-type data specified for command 3
10 = Scan time is at 0
Scan Time
(x100ms): This index number is used to specify the time period for the read
and write phases of the controller to PLC communications. Enter a
number from 1 to 255 (0.1 to 25.5 seconds). [DDIA = B685, DDIB =
B661]
Scan Overruns: This counter is incremented each time the read-write phases
exceed the specified scan time. If the counter is incrementing, the
communication transfer is not being completed in the allotted time.
The Scan Time should be increased. [DDIA = B686, DDIB = B662]
Starting Memory
Address - Read: This is the beginning memory address for reading data from the
PLC. All subsequent memory locations are referenced from the
starting location as contiguous words of data. The data that is read
is mapped into the controller database in the exact same order. This
is a decimal number that is converted and stored as two bytes in the
controller database. [DDIA = B665 &B666, DDIB = B641 & B642]
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]
ENTRY EXPLANATION