Appendix D How to Use PLC Function
External output: Y0~Y7, Y10~Y17…(device number)
3.Decimal Number (DEC)
The suitable time for decimal number to use in
To be the setting value of timer T or counter C, such as TMR C0 K50. (K constant)
To be the device number of M, T, C and D. For example: M10, T30. (device number)
To be operand in application command, such as MOV K123 D0. (K constant)
4.BCD (Binary Code Decimal, BCD)
It shows a decimal number by a unit number or four bits so continuous 16 bits can use to represent the four numbers of decimal number. BCD code is usually used to read the input value of DIP switch or output value to
5.Hexadecimal Number (HEX)
The suitable time for hexadecimal number to use in
To be operand in application command. For example: MOV H1A2B D0. (constant H) Constant K:
In PLC, it is usually have K before constant to mean decimal number. For example, K100 means 100 in decimal number.
Exception:
The value that is made up of K and bit equipment X, Y, M, S will be bit, byte, word or double word. For example, K2Y10, K4M100. K1 means a
Constant H:
In PLC, it is usually have H before constant to mean hexadecimal number. For example, H100 means 100 in hexadecimal number.
D.4.4 The Function of Auxiliary Relay
There are output coil and A, B contacts in auxiliary relay M and output relay Y. It is unlimited usage times in program. User can control loop by using auxiliary relay, but can’t drive external load directly. There are two types divided by its characteristics.
1.Auxiliary relay for general : It will reset to Off when power loss during running. Its state will be Off when power on after power loss.
2.Auxiliary relay for special : Each special auxiliary relay has its special function. Please don’t use undefined auxiliary relay.
D.4.5 The Function of Timer
The unit of timer is 1ms, 10ms and 100ms. The count method is count up. The output coil will be On when the present value of timer equals to the settings. The setting is K in decimal number. Data register D can be also used as settings.
The real setting time of timer = unit of timer * settings
Revision June 2008, 04EE, |
