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6.1.2 Shared Memory Addresses
Configuration of shared memory in S-LINK
Address
Allocation
Control flag/
H0
Error flag
No. of units
H1
where error
occurred
No. of units
H2
connected
Total No. of
H3
inputs/outputs
No. of input
H4
points
No. of output
H5
points
No. of
words
Indicates S-LINK unit control and error contents.
• If bit 0 (ERR1) = 1, the protective function that
guards against a short-circuit between D – G line
has been triggered. To cancel the short-circuit
protective function, turn off the power supply to the
S-LINK, correct the cause of the short-circuit, and
1
re-boot the unit (the short-circuit protective function
continues to be active as long as the S-LINK power
supply is on.)
• If the S-LINK power supply is off, bit 0 (ERR1) and
bit 2 (ERR3) = 1.
• Bit 3 (ERR4) = 1 is retained. To cancel it, the FPΣ
power supply must be turned off and then on again
(or the system SET button pressed and reset). Or
turn on the S-LINK power supply again.
• If communication is in progress, bit 4 (S-LINK
communication status) is "1".
• Bit 6 (Set) has the same function as the system
SET button on the main unit and the system set of
the shared memory address H6. If "1" is written for
this bit, the S-LINK connection status at that points
is read. This bit automatically returns to "0" after the
connection status has been read.
This indicates the target number of connected
1
devices if ERR4 (Error 4) occurs.
This indicates the number of S-LINK I/O devices
1
connected to the S-LINK unit.
The total number of input and output points, the
number of input points, and the number of output
3
points specified using the MODE switch are input. A
numeric value of 0, 16, 32, 64, 96 or 128 points is
input.
Set value
Read
Write
A
A
A
N/A
A
N/A
A
N/A
6-3
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