ICC
55
Table 6: Function Code-to-Register Conversion
Function Code Group
Group
Number
Example
Code
Name
F
Fundamental
Functions
0
F07 (acceleration time 1): (0 x 256) + 7 + 1 = 8
E
Extension Terminal
Functions
1
E98 (terminal [FWD] function): (1 x 256) + 98 + 1 = 355
C
Control Functions
2
C20 (jogging frequency): (2 x 256) + 20 + 1 = 533
P
Motor 1 Parameters
3
P03 (motor rated current): (3 x 256) + 3 + 1 = 772
H
High Performance
Functions
4
H11 (deceleration mode): (4 x 256) + 11 + 1 = 1036
A
Motor 2 Parameters
5
A15 (number of poles): (5 x 256) + 15 + 1 = 1296
S
Command Data
7
S05 (frequency command): (7 x 256) + 5 + 1 = 1798
M
Monitor Data 1
8
M09 (output frequency): (8 x 256) + 9 + 1 = 2058
J
Application Functions
13
J03 (PID proportional gain): (13 x 256) + 3 + 1 = 3332
Y
Link Functions
14
Y98 (bus link function): (14 x 256) + 98 + 1 = 3683
W
Monitor Data 2
15
W32 (PID output): (15 x 256) + 32 + 1 = 3873
X
Alarm Data 1
16
X00 (alarm history / latest): (16 x 256) + 0 + 1 = 4097
Z
Alarm Data 2
17
Z53 (3
rd
last alarm torque): (17 x 256) + 53 + 1 = 4406
6.2 Scanned and Non-Scanned Registers
The interface card provides network access to inverter registers as two different classes. The first class,
called “
scanned registers
” is comprised all Command Data (S), Monitor Data 1 (M) and Monitor Data 2
(W) function code groups. These registers are constantly being “scanned” by the interface card, which
is to say that they are constantly being read and/or written (as applicable), and their current values are
therefore mirrored in the interface card’s internal memory. Because these inverter registers are mirrored
by the interface card, they have the following advantages:
•
Access speed: when a network protocol accesses a scanned register (read or write), the value is
available immediately. The interface card does not have to make a corresponding request to the
inverter to resolve the network access.
•
In the web browser’s monitor tab, the values of scanned registers are continuously updated. An
explicit on-demand “refresh” does not have to be initiated in order to view the current inverter values
(refer to section 5.4.5).
•
Only scanned registers may be used when configuring alarm processing (section 5.9), dashboard
gauges (section 5.11) and I/O protocols (such as EtherNet/IP consumed & produced data
configuration arrays).
The principle disadvantage of scanned registers is that write data checking is not available. This means
that when the value of a scanned register is modified via a network protocol or via the web browser’s
monitor tab, the interface card itself is not able to determine if the new value will be accepted by the
inverter (the value may be out-of-range, or the inverter may be in a state in which it will not accept new
values being written via communications, etc.) For example, if a write is performed to a scanned
command register with a data value that is out-of-range, the interface card will not generate a
corresponding error. However, if end-to-end confirmation of such data writes is required, then the
register can be read over the network at a later time to confirm that the written value “took hold” in the
