HORNER HE-XP7E0, Руководство пользователя

Страница: 51 / 192

MAN1106-07-EN_XL+_UserManual
M a y 6
t h
, 2 0 2 0 P a g e 51 | 192
CHAPTER 6: REGISTERS
6.1 Register Definitions
When programming the XL+ OCS, data is stored in memory that is segmented into different
types. This memory in the controller is referred to as registers. Different groups of registers
are defined as either bits or words (16 bits). Multiple registers can usually be used to handle
larger storage requirements. For example, 16 single bit registers can be used to store a word,
or two 16-bit registers can be used to store a 32-bit value.
Table 6.1 - Types of Registers found in the XL+ OCS
%AI Analog Input
16-bit input registers used to gather analog input data such as voltages,
temperatures, and speed settings coming from an attached device.
%AQ Analog Output
16-bit output registers used to send analog information such a voltages,
levels or speed settings to an attached device.
%D Display Bit
These are digital flags used to control the displaying of screens on a
unit which has the ability to display a screen. If the bit is SET, the screen
is displayed.
%I Digital Input
Single-bit input registers. Typically, an external switch is connected to
the registers.
%K Key Bit
Single-bit flags used to give the programmer direct access to any front
panel keys appearing on a unit.
%M Retentive Bit Retentive single-bit registers.
%Q Digital Output
Single-bit output registers. Typically, these bits are connected to an
actuator, indicator light or other physical outputs.
%R General Purpose
Register
Retentive 16-bit registers.
%S System Bit Single-bit bit coils predefined for system use.
%SR System Register 16-bit registers predefined for system use.
%T Temporary Bit Non-retentive single-bit registers.
6.2 Useful %S and %SR registers
Table 6.2 – Common %S Register Definitions
Register Name Description
%S1 FST_SCN Indicate First Scan
%S2 NET_OK Network is OK
%S3 T_10MS 10mS timebase
%S4 T_100MS 100mS timebase
%S5 T_1SEC 1 second timebase
%S6 IO_OK I/O is OK
%S7 ALW_ON Always ON
%S8 ALW_OFF Always OFF
%S9 PAUSING_SCN Pause 'n Load soon
%S10 RESUMED_SCN Pause 'n load done
%S11 FORCE I/O being forced
%S12 FORCE_EN Forcing is enabled
%S13 NET_IO_OK Network I/O is OK
%S16 Ethernet COM module is OK