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6 Programless Communications
6-2-2
Communications Unit No. and Communications Baud Rate
Always assign communications unit numbers in order starting from 0. Do not skip any numbers. The
recommended communications baud rate is 38.4 for a Mitsubishi FX3 PLC and 115.2 for other PLCs.
Set the same communications baud rate for all of the E5 D Controllers and the PLC. (Setting the PLC
is required only for programless communications.)
Communications Setting Level
Display condition: None
Parameter name
Communications Unit
No.
Communications Baud
Rate
6-2-3
Send Data Wait Time
The send data wait time is the wait time from when the E5@D receives a response from the PLC until it
sends a command. We recommend a send data wait time setting of 1. Increase the value if commands
are sent too soon for the PLC to receive them.
Communications Setting Level
Display condition: None
Parameter name
Send Data Wait Time
6-2-4
Write Mode
With the default settings, the E5@D writes the set values to non-volatile memory (i.e., in Backup Mode).
If you frequently change set values with programless communications, use an operation command or
the Write Mode parameter in the communications setting level to change to RAM Write Mode.
In RAM Write Mode, however, the set values will be restored to the values in non-volatile memory every
time the power supply is cycled. If you need to maintain the current set values before the power supply
is turned OFF, use an operation command to save them to RAM before the power supply turns OFF.
Communications Setting Level
Display condition: None
Parameter name
Write Mode
6 - 8
Displayed characters
0: Master
u-no
1 to 31: Slaves (FX3: 1 to 15)
9.6: 9,600 bps
bps
19.2: 19,200 bps
38.4: 38,400 bps
57.6: 57,600 bps
115.2: 115,200 bps
Displayed characters
0 to 99 ms
sdwt
Characters
bkup: Backup Mode
ramm
ram: RAM Write Mode
E5@D Digital Temperature Controllers Communications Manual (H225)
Setting range
Setting range
Setting range
Default
1
9.6
Default
20 ms
Default
bkup
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