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PACS

logic commands. The OR command can be used to

set specific bits to "1", while the AND command can be

used to clear specific bits to "0". The EX OR (exclusive-or)

command can be used to toggle specific bits between "0"

and "1". In the following example, the OR command is

used to set bit 7, while leaving bits 0 to 6 unchanged.

PACS

Command (ORS#ED,#80):

6A 00 ED 80

PACS

TIMEOUT SETTING

00EE SING

The PACS

Timeout Setting parameter is a SING

byte value, where all values from $00 to $FF are valid. The

value of the parameter represents time in 0.5 second

increments. For example, a value of $14 (20 decimal)

represents 10 seconds. If a PACS

command is not

received before this time expires (referred to as a PACS

timeout), the DHC controller will clear bits 0, 1, and 2 of

the PACS

Control Register parameter. This has the

effect of disabling bus control of the DHC outputs.

The DHC uses a PACS

timeout to detect a loss of

command when it is configured for a Digital command

type. In this case, bit 0 of the Alarm Flags parameter (see

Section II) is set to "1", and the DHC outputs are controlled

according to the "loss of command setting" (see Con-

figuration parameter in Section II).

Note that the OCM-101 Modbus Option Module

supports other Modbus functions. The OCM-101 only

sends PACS

commands to the DHC in response to

Function Code $41 (PACS

Function). Broadcast

commands (node 0) with the PACS

Function are

processed as normal; however, the OCM-101 will not send

a responding ADU.

The PACS

Timeout Setting parameter can be

written at anytime as shown in the example below:

PACS

Command (CS#EE,20):

62 00 EE 14

The parameter can be read at anytime as shown below:

PACS

Command (RS#00EE):

50 00 EE

Returned Data (example):

PACS

RESET

00EF SING

The PACS

Reset parameter is a SING byte value

that is used to force a DHC controller reset. This has the

same effect as powering the DHC off and then on. To reset

the DHC controller via the bus, write a value of $FF to this

parameter as shown in the following example. Reading this

parameter returns an unknown value and has no significant

meaning to the user.

PACS

Command (CS#EF,#FF):

62 00 EF FF

USER NON-VOLATILE MEMORY

6070 DOUB

6072 DOUB

6074 DOUB

6076 DOUB

6078 DOUB

607A DOUB

607C DOUB

607E DOUB

This group of DOUB byte values provides 16 bytes

of non-volatile memory that may be used by the user for

any purpose. The initial values of these locations are

cleared to zero at the time of manufacture. Writing these

locations can only be done using the CHANGE DOUB byte

command with direct addressing (PACS

Code $82) as

shown in the example below. Using any other writing

command will result in no operation.

PACS

Command (CD#6070,#03E8):

82 60 70 03 E8

These locations can only be read using the READ

DOUB byte command with direct addressing (PACS

Code $51) as shown below. Any other READ command

will return $FF data.

PACS

Command (RD#6070):

51 60 70

Returned Data (example):

03 E8

Brand	Peaktronics
Model	92 Series
Category	Controller
Language	English

Peaktronics 92 Series User Manual

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