Inovance H3U Series - System Error Code D8064

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3 Elements3.4 Status Relay
You can use parameters to adjust the regions for the PLC's general auxiliary relays and auxiliary relays
which can be retained upon power failure.
The PLC has many special auxiliary relays with different functions. For details, see
“Appendix A Allocation of
Soft Elements SM, SD, D8000, and M8000” on page 704
. Note: Undened special auxiliary relays are unusable.
Usage tips: You can access consecutive M variables by bytes or words. For example,
K4M100 indicates reading the M100, M101, M102……M115 (16 units in total) as one unit (using M100 as
bit 0 of the word …… and M115 as bit 15 of the word), which can improve the programming efciency.
3.4 Status Relay
The status relay S is used to design and execute stepping projects. It uses the STL stepping instruction to control
the transfer of the stepping status S and thus simplies the project design.
If the STL programming method is not used, the S can be used as a general bit element, like the M variable. The
status S variables are marked with S0, S1, ……and S999, and numbered with a decimal number. Some of the S
variables can be retained upon power failure.
For general purpose
For retention
purpose
For alarm purpose
For retention
purpose
S0 to S9
10 points
[1]
S10 to S499
490 points
[1]
S500 to S899
400 points
[2]
S900 to S999
100 points
S1000 to S4095
3096 points
[3]
• [1] It cannot be retained upon power failure. It can be set to be retained upon power failure through parameter
setting.
• [2] It can be retained upon power failure. It can be set to be not retained upon power failure through parameter
setting.
• [3] It can be retained upon power failure and the status cannot be modied through parameter setting.
3.5 Timer
Timers are used for timing. Each timer consists of a coil, contacts, and a counting value register. When the timer
coil is "energized" (the ow is valid), the timer starts timing. If the timing value reaches the preset time value,
contact a (NO contact) is closed, and contact b (NC contact) is opened. When the coil is "de-energized" (the ow
is invalid), the timer contacts restore to the initial state, and the timing value is automatically cleared. The timing
values of some timers can be accumulated or retained upon power failure. The timing value before power failure
is kept after the timer is energized again.
The timers are marked with T0, T1, …… and T255, and numbered with a decimal number. Timers have different
timing steps, for example, 1 ms, 10 ms, and 100 ms. Some timers can be retained upon power failure.