CAMAC Module 154 - Stepping and Induction Motor Controller

General Description

This single-width module contains a 15-bit 150Hz count-down counter. After being loaded, the counter automatically counts down until a count of zero is reached. When the counter is running, two different types of outputs are provided. Five-volt 50 uS pulses are used to increment or decrement stepping motors depending upon the status of the sign flip-flop. Relay closures are used to run induction motors *eg. collimator control) in either of two directions, again depending upon the status of the sign flip-flop. The counter may be written, read, or cleared at any time. For power supply control, 1100mS ON, OFF, and RESET pulses are provided rrom isolated relay contacts. An additional writable and readable flip flop provides an extra relay contact called "POLARITY". Four inputs are provided for status monitoring (8 on the Jorway models).

Software

Read/Write coding to all registers is shown below

							Polarity	Counter
24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1

Sign bit
- 0 = 50uS "UP" pulses
  "OPEN" relay contact closure
- 1 = 50uS "DOWN" pulses
  "CLOSE" relay contact closure
Polarity bit
- 0 = "POLARITY" relay contact open
- 1 = "POLARITY" relay contact closed

Commands
F(0) A(0)	Reads counter, polarity bit (Inhibits counter during reading)
F(0) A(1)	Reads status bits
F(6) A(0)	Reads module number
F(9) A(0)	Clears counter
F(12) A(0)	Generates "RESET" pulse
F(28) A(0)	Generates "OFF" pulse
F(30) A(0)	Generates "ON" pulse
F(16) A(0)	Loads counters, polarity bit (inhibits counter during loading)
Z	Clears counter

Front Panel

Module Select LED: Flashes whenever module is addressed
Up LED: On when counter is counting and a "0" has been loaded into the sign bit
Down LED: On when counter is counting and a "1" has been loaded into the sign bit

Viking I/O

B SIDE	SIGNAL	A SIDE	SIGNAL
1L	GND	1R	GND
2L		2R
3L		3R
4L	Status input 1	4R	Status input 5
5L	Status input 3	5R	Status input 7
6L	Status input 2	6R	Status input 6
7L	Status input 4	7R	Status input 8
8L		8R
9L	Polarity relay	9R	Polarity relay
10L	OFF relay	10R	OFF relay
11L		11R
12L	ON relay	12R	ON relay
13L	DOWN relay	13R	DOWN relay
14L	UP relay	14R	UP relay
15L	RESET relay	15R	RESET relay
16L	UP pulses (Lo side)	16R	UP pulses (Hi side)
17L		17R
18L	DOWN pulses (Lo side)	18R	DOWN pulses (Hi side)

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