FC 62 - Remote Control Memory

The remote control memory (RCM) function code is a set/reset flip-flop memory accessible by a console, control station, Batch 90 or computer via a network interface unit (NIU).

The output is determined from the inputs S, R and P as shown in Table 62-1 and Figure 62-1.

 

 

Table 62-1  RCM Input to Output Relationship

 

S

R

P

Output N

0

0

X

Last

1

0

1

1

0

1

X

0

1

1

1

Override <S4>

 

NOTE:

S = Local set <S1>, or remote set (console or network interface unit)

R = Local reset <S3>, or remote reset (console or network interface unit)

P = Set permissive <S2>

X = Either logic 0 or logic 1 (does not care)

 

Specifications:

Spec

Tune

Default

Type

Range

Description

S1

N

0

I

Note 1

Block address of local set signal

S2

N

1

I

Note 1

Block address of set permissive signal:

0 = no permissive

1 = permissive

S3

N

0

I

Note 1

Block address of local reset signal

S4

N

0

I

Note 1

Block address of override signal:

0 = reset override

1 = set override

S5

N

0

I

Note 1

Block address of initialize signal:

0 = reset

1 = set

S6

N

0

I

Note 1

Block address of feedback signal

S7

N

0

I

Note 1

Block address of alarm signal

S8

N

0

I

0 - 255

Type parameter

 

NOTES:

1. Maximum values are: 9,998 for the BRC-100, IMMFP11/12 and 31,998 for the HAC

 

 

62.1 Explanations

 

62.1.1  Specifications

 

S1 – SET

Block address of the local set input.

 

S2 – PERM

Block address of the set permissive input. Specification <S2> must equal logic 1 for the remote control memory block to act on any set, local or remote input.

 

S3 – RES

Block address of local reset input.

 

S4 – OVR

Block address of override input. If <S1>, <S2> and <S3> equal logic 1, the output tracks <S4>

 

S5 – INIT

Block address of the input referenced upon power up or resetting of the module.

If <S5> = 0, N = 0

If <S5> = 1, N = 1

 

S6 – FB

Block address of the feedback signal. It is affected by the output of the RCM block and transmits a status signal to the

console or network interface unit. It can be feedback from an internal or external logic input.

 

S7 – ALRM

Block address of the alarm input. This transmits a status signal to the console or network interface unit. Logic 1 is an alarm

state.

 

S8 – TYPE

Switch type parameter. With S6 and S7, it defines the configuration of pushbutton displays shown on display screens.

 

                 

 

 

62.1.2 Control Station Control

 

The operator can initiate two types of push button commands from a control station: pulse commands and sustained commands. The commands are either pulse set and pulse reset, or sustain set and sustain reset. The type of commands selected depends on the configuration of the control station.

 

There are two types of inputs to the block: logic set/reset inputs and the operator initiated remote set/reset inputs from the console. Commands from a control station are logic commands because they enter the RCM block from other blocks in the module. Commands from a console are not logic commands because they enter the RCM block directly from the console.

 

Logic inputs from control stations or configuration override operator initiated inputs from a console. The module acts on the remote (from operator interface station, etc.) and logic (<S1>, <S3>) commands as shown by the equivalent circuit in Figure 62-1, and outputs the proper value. Logic commands always override remote commands, and sustain commands override pulse commands.

 

 

 

Pulse Set

Causes the internal set signal to go to logic 1 for one cycle, provided there is no contradictory logic or sustain command issued.

 

Pulse Reset

Causes the internal reset signal to go to logic 1 for one cycle, provided there is no contradictory logic or sustain command issued.

 

Sustain Set

Causes the internal set signal to go to logic 1 and remain there as long as the sustain set is in effect or until a contradictory logic command is issued.

 

Sustain Reset

Causes the internal reset signal to go to logic 1 and remain there as long as the sustain reset is in effect or until a contradictory logic command is issued.

 

Red Tag

Commands flag controls that are under maintenance. A red tag, remove red tag, or get red tag status can be requested. All red tag commands have a 16 bit non-zero key as an identifier. The module maintains up to three keys for every pushbutton block, allowing the establishment of up to three red tags. The red tag functions act only as labels, and do not interfere with module operations. The red tag function does not provide positive lock-out of equipment operation. The red tag function only inhibits control at the console when it inhibits operator commands.

 

62.2  Applications

 

Figure 62-2 illustrates the module logic and circuits required to control a motor with a function code 62 block. When a start signal is received (either logic or remote), the circuit is completed, energizing the motor start relay and closing the normally open seal switch. When the start signal returns to logic 0 after one cycle, the closed switch completes the circuit keeping the motor turned on until a stop signal breaks the circuit.