Instruction manual

6. MODBUS COMMUNICATION PROTOCOL
IMR01H02-E3
60
Continued from the previous page.
Name Data range Factory set
value
Attri-
bute
Data bit configuration
1
See
data bit configuration table
2
0R/W
Interval time
1
0 to 250 ms 10 R/W
EEPROM storage
mode
3
0: Backup mode
(Set values are store to the EEPROM)
1: Buffer mode
(No set values are store to the EEPROM)
0R/W
1
The value changed becomes effective when the power is turned on again or when changed from
STOP to RUN.
2
Data bit configuration table
Set value Data bit Parity bit Stop bit
0 8 Without 1
1 8 Without 2
28Even1
3 * 8 Even 2
48Odd1
5 * 8 Odd 2
6 * 7 Without 1
7 * 7 Without 2
8 * 7 Even 1
9 * 7 Even 2
10 * 7 Odd 1
11 * 7 Odd 2
* When the Modbus communication protocol selected, this setting becomes invalid.
3
The non-volatile memory (EEPROM) has limitations on the number of memory rewrite times.
If the buffer mode is selected as an EEPROM storage mode, all of the set values changed are not
written to the EEPROM and thus a problem of limitations on the number of memory rewrite times
can be solved. When the memory is used to frequently change the set value via communication,
select the buffer mode.
When selecting any EEPROM storage mode, take notice of the following.
• If power failure occurs while the buffer mode is selected, the set value returns to the value before
the storage mode is selected.
• If the buffer mode is changed to the backup mode, all of the set values at that time are stored to
the EEPROM. If necessary to backup the final value of each set item, select the backup mode.
• When the power is turned on, the backup mode is always set.
Continued on the next page.
Setting range of
RKC communication
Setting range of
Modbus