Omron MX2 DEVICENET OPTION BOARD User Manual page 94

Note 2
Note 3
Note 4
Note 5
80
5 words.
Both output as input size should have a minimum size of 1 word.
Setting specific parameters in the range to 0 (not at the end), can be used to
reserve IO memory. If set to 0 (zero), an output register is ignored and a 0
(zero) is mapped into an input register.
Double-word MX2 registers should be mapped with two modbus registers in
sequence: high-word following low-word.
Mapping only the low word in output data will write zero in the high word of the
MX2 register.
Mapping only the low word in input data is not allowed.
It is not allowed to map the same register more than once in the output area.
An incorrect setting of P160 to 179 will lead to a Major Recoverable Fault (MS
blinking Red) and inverter trip state E64. In such case, correct the parameter
values and restart (or reset, see APPENDIX E DeviceNet Explicit Messages)
the Unit.
Tip In case the trip state E64 is generated, multiple incorrect settings in range
P160 - 179 can have caused this error. If the error persists after some
changes: it would be convenient to start with a small configuration which is
correct and add a new register one by one (checking by restarting the Unit).
Tip Set the following register values:
• P160 = 1F01h: This gives you control over Modbus Coils 0000h through
000Fh using the first output word. These coils implement all the important
control functions of the MX2-A@ Inverter.
• P161 = 0001h and P162 = 0002h: This gives you control over the fre-
quency reference using output words 2 and 3.
• P170 = 1E01h: This allows you to monitor Modbus Coils 0010h through
001Fh as the first input word. These coils implement the most important
status information of the MX2-A@ Inverter.
• P171 = 1001h and P172 = 1002h: This allows you to monitor the output
frequency using input words 2 and 3.
The Modbus coil definitions for the MX2-A@ Inverter are listed in section B-4-
1 of the MX2 User's manual (Cat. No. I570).
In case the output data is required to be as small as possilbe, please consider
to only use register 0002h (instead of both 0001h and 0002h) as frequency
reference. The resulting configuration is P160 = 1F01h and P161 = 0002h.
APPENDIX F