
B-62714EN/04 OPERATION 1.16/18/21-B, 16/18-C, LCD-MOUNTED TYPE 16i/18i/21i-A/B
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Setting items and display items
Setting items
Table III-1-3
Item Description
MAX SLAVE NO.
Maximum slave station number used for
communication with the master station.
Setting range: 1 to 31(Note)
SCAN TIME
Station number of the slave station.
Setting range: 1 to 31(Note)
STATUS ADDRESS
Start address of an area for storing communication
status.
Setting range: R area of the PMC
OPTION1
Slave station communication monitoring time
Guideline for setting:
OPTION1 = MAX SLAVE NO. × 5
Setting unit: 100 msec
Setting range: 0000 to 1000 [hexadecimal]
When the default value 0 is used, a value
determined by the guideline for setting is assumed
for operation.
OPTION2 Not used
DI/DO MAP MODE
Determines the method of allocating a DI/DO data
area.
Setting: 0, 2
0: DI/DO data transfer function
A DI data area and DO data area are allocated for
one station.
2: Global I/O transfer function(Caution)
A DI data area is allocated for the number of
stations set in MAX SLAVE NO. plus 1, and a DO
data area is allocated for one station.
DI/DO DATA SIZE
DI/DO data area size.
For the DI/DO data transfer function
Setting range: 0 to 32 (16/18/21-B)
Setting range: 0 to 62 (16/18-C)
Setting range: 0 to 128 (LCD-mounted type
16i/18i/21i-A)
For the global I/O transfer function
Setting range: 0 to 48
(Unit: Bytes)
DO ADDRESS
DO data area start address
Setting range: R area of the PMC
DI ADDRESS
DI data area start address
Setting range: R area of the PMC
MESSAGE SIZE Not used
OUTPUT ADDRESS Not used
INPUT ADDRESS Not used
CAUTION (*1)
When using the global I/O transfer function, ensure
that the DI data size and DO data size of each slave
station on the network do not exceed 48 bytes.