Micromod Micro-DCI: 53MC5000 PLC AND PRINTER INTERFACES - Manual (Page 95)

8.5 KOYO HEADER BLOCK COMMAND BYTE
The two command codes that are used in the read/write byte of the Koyo DirectNET header block
are 30 for read and 38 for write.
8.6 CONTROL BYTES FOR KOYO
The APB Setup Bytes, PLC Control and Status Bytes, PLC Read Control Bytes, and PLC Write
Control Bytes are presented in Tables 8-1 through 8-4. If any Control Byte is changed during
operation, it takes up to 10 seconds to become effective. (There is a 10 second interval be-
tween PCS checks for setup changes.)
Table 8-1. APB Setup Bytes for Koyo
Title Definition Set
By
DDI-A DDI-B De-
fault
Mode It indicates the APB communications functionality as
follows:
0 = Off, 5 = Koyo
This datapoint should be left at 0 and configured to
a 5 after all of the other control bytes are
configured because setting this datapoint causes
the Koyo PLC Interface functionality to start.
User B290 B456 0
Baud
Rate It designates the data transfer rate as follows:
10 = 38400, 9 = 28800, 8 = 14400, 7 = 19200,
6 = 9600, 5 = 4800, 4 = 2400, 3 = 1200, 2 = 600,
1 = 300, 0 = 110 User B292 B458 0
Set-Up It designates the data format transfer protocol as
follows:
0 = 8 bits, 1 stop bit, no parity
1 = 8 bits, 1 stop bit, even parity
2 = 8 bits, 1 stop bit, odd parity
User B293 B459 0
Table 8-2. PLC Control and Status Bytes for Koyo
Title Definition DDI-A DDI-B Set
By
De-
fault
Setup
Error It indicates the following: 0 = No Error, 1 = L-words to
read > 32, 2 = C-words to read > 64, 3 = L-words to
write > 32, 4 = C-words to write > 64, 5 = Memory type
not 31, 10 = Scan Time at 0. These error codes cause
DDI channel operation to halt. B684 B660 Soft-
ware 0
Scan
Time It is the PCS time period for the read and write phases
of a PCS-PLC transaction. It is entered as a number
from 1 to 255 which represents 100 to 25,500 ms. B685 B661 User 0
Scan
Overruns
Counter* This counter is incremented each time the read-write
phases exceed the specified Scan Time. It indicates the
Scan Time should be increased B686 B662 Soft-
ware 0
*User can reset by writing zeros into the datapoints.
Section 8. Koyo Mode
KOYO
8-3