PROGRAM MAINTENANCE PANEL DATA MULTIPLEXER AND BUS DRIVER RECEIVER CIRCUIT

T.O. 31S5-4-308-l

T M 11-5805-663-14-13

NAVELEX 0967-464-0010

output of G16 forces all of the data multi-

I7 disable gate G16 (output low). The low

plexers U6, U16, U26 and U36 outputs low.

outputs of inverters I5 and I6 are constantly

With VADB-P low, G2 through G10 are

disabling the lower AND gates of gates G11

enabled. With HTDP-P high, G14 is

and G12 causing G11 and G12 to function

activated and its low output is applied to

as inverters. When DRDB-N is high the

the DBOO-N input of data bus driver re-

low output of G16 strobes the AOOS-P

ceiver U40. G13 is disabled by RNDB-P

through Al5S-P inputs through data multi-

(low). The outputs of G2 through G13 and

plexers U6, U16, U26, and U36. The

12, I3, and I4 are now high and the output

outputs of data multiplexers U6, U16, U26,

of G14 is low. When DOUT-P goes high

and U36 are coupled through enabled gates

the halt command is strobed to the INFIBUS

G2, G3, G4, G5, G6, G7, G8, G9, G10,

as explained previously.

G11, G12, G13, G14 and inverters I2, I3

and I4 to the bus driver receivers U10,

5 - 6 7 2 . T h e runcommand /l,l,l,l,

U20, U30, and U40. When DOUT-P goes

/1,1,1,1,/i,i,1,1,/1,1,0,1/(000216) is

high, the 16-bit data information is

strobed to the INFIBUS by DOUT-P when

strobed through the data bus driver

RNDB-P is high and VADB-P and HTDB-P

receivers Ul0, U20, U30, and U40 to the

are low. The high level of RNDB-P is

INFIBUS and inverted and routed to the

inverted by G15, forcing the output of G16

address and data shift registers of the

high. The high output of G16 forces all of

Program Maintenance Panel address/data

the data multiplexers U6, U16, U26, and

switch identification, multiplexers, and

U36 outputs low. With VADB-P low, G2

LED circuits. For example, assume A15S-P

through G10 are enabled. RNDB-P acti-

is high, the high 4Y output of data multi-

vates G13, forcing its output low. With

plexer U6 is coupled through and inverted

both inputs to G13 low, its output is high.

by enabled G2 to gate Gl. When DOUT-P

The outputs of G3 through G12, G14, and

goes high Gl is activated and DBl5-N goes

I2, I3, and I4 are now high and the output

low. Also, data signals from the infibus

of G14 is low. When DOUT-P goes high

are coupled through the inverters of data

the run command is strobed to the INFIBUS,

bus driver receivers Ul0, U20, U30, and

U40 to the address and data shift registers

as explained previously.

of the Program Maintenance Panel address/

5 - 6 7 3 . T h e step command /l,l,l,l,

data switch identification, multiplexers,

/1,1,1,1,/1,1,,1,/1,1,0,0,/(0003 16)

and LED circuits.

is strobed to the INFIBUS by DOUT-P when

RNDB-P and HTDB-P are high and VADB-P

5 - 6 7 0 . The data shift register outputs,

is low. Operation is similar to the halt

DOOS-P through Dl5S-P, from the Program

and run commands, as explained previously,

Maintenance Panel address/data switch

except the outputs of G13 and G14 are both

identification, multiplexer, and LED cir-

low due to RNDB-P and HTDB-P,

cuits are coupled to the INFIBUS when

respectively.

DRDB-N, RNDB-P, VADB-P, and HTDB-P

are low. Operation is similar to the

5 - 6 7 4 . The zero address /l,1,1,1,

address shift register outputs, AOOS-P-

/1,1,1,1,/1,1,1,1,/1,1,1,1/(000016) is

A15S-P, except DRDB-N is low, the output

strobed to the INFIBUS by DOUT-P when

of Gl6 couples the DOOS-P through Dl5S-P

RNDB-P, VADB-P, HTDB-P and FMRA-N are

inputs through data multiplexers U6, U16,

low. Operation is similar to when the ad-

U 1 7 U18.

dress shift register or data shift register

information is strobed to the INFIBUS,

5 - 6 7 1 . The halt command /l, 1, 1, 1,

except the output of G16 is held high by

/1,1,1,1,/1,1,1,1,/1,1,0/ (0001 16) is

FMRA-N, forcing all of the outputs of data

strobed to the INFIBUS by DOUT-P when

multiplexers, U6, U16, U26, and U36 low.

RNDB-P and VADB-P are low and HTDB-P is

high. HTDB-P IS inverted by I7 and the

5 - 6 7 5 . The control panel address /0,0,0,0,

low output of 17 activates G16. The high

/0,0,0,0,/0,1,1,1,/1,1,1,1,/(FF80 16)

5-103