● If no error occurs, the values of [S1] and [S2] should be set to system data register (SD40,
SD41) of the CPU unit.
■
Specification of [S1] and [S2]
● Specify a slot number of the unit in [S1]. The set value for [S1] should be stored in system
data register SD40.
● Specify a communication port in [S2]. (In the case of SCU: COM port number. In the case of
CPU with built-in ET-LAN: connection number.) The set value for [S2] should be stored in
system data register SD41.
Unit type
[S1]
Slot No.
[S2]
COM port No.
User connection No.
CPU with built-in SCU
U0
U0 to U2
CPU with built-in ET-LAN
U100
U1 to U16
U17 to U216
Serial Communication Unit (SCU)
U1 to U64
U1 to U4
(Note 1)
CPU unit Ver. 3 and later is required to use connection numbers U17 to U216 for a CPU unit with built-
in ET-LAN. In addition, the number of user connections must also be changed in tool software "FPWIN
GR7 Configuration"
Built-in ET-LAN
>
Add-on
.
■
Program example
UNITSEL
U 0
U 2
S2
R0
S1
Example 1) Specify COM2 for SCU with built-in CPU in Slot 0
UNITSEL
U 100
U 5
S2
R0
S1
Example 2) Specify User Connection 5 for ET-LAN with built-in CPU in Slot 100
■
Flag operations
Name
Description
SR7
SR8
(ER)
To be set in the case of out-of-range in indirect access (index modification).
The COM port specified by [S2] does not exist (no cassette, not a communication cassette).
The connection specified by [S2] does not exist (out of the connection number range).
15.1 UNITSEL (Specification of a Communication Unit Slot Port)
WUME-FP7CPUPGR-12
15-3
Summary of Contents for FP7 Series
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