6.7 MODULE 7 - SERIAL COMMUNICATIONS PARAMETERS (

)

This module can only be accessed if a Serial Communications Card is installed.

 

PARAMETER MENU

 

* Only appears if the Real-Time Clock Card is installed.

Module 7 is the programming module for the Serial Communications Parameters. These parameters are used to match the serial settings of the meter with those of the host computer or other serial device, such as a terminal or printer. This programming module can only be accessed if an RS232 or RS485 Serial Communications card is installed.

This section also includes an explanation of the commands and formatting required for communicating with the meter. In order to establish serial communications, the user must have host software that can send and receive ASCII characters. For serial hardware and wiring details, refer to section 4.5 Serial Communication Wiring.

This section of the PTC900/PTC901 bulletin replaces the bulletin shipped with the RS232 and RS485 serial communications plug-in cards. Discard the separate bulletin when using those serial plug-in cards with the PTC900/PTC901. Also, this section does NOT apply to the Modbus communication cards. For details on the operation of the Fieldbus cards, refer to the bulletin shipped with each card.

BAUD RATE

«

ª

Set the baud rate to match the other serial communications equipment on the serial link. Normally, the baud rate is set to the highest value at which all the serial equipment are capable of transmitting and receiving data.

DATA BITS

«

ª

Select either 7- or 8-bit data word lengths. Set the word length to match the other serial communications equipment on the serial link.

PARITY BIT

«

ª

This parameter only appears when the Data Bits parameter is set to a 7-bit data word length. Set the parity bit to match that of the other serial communications equipment on the serial link. The meter ignores parity when receiving data and sets the parity bit for outgoing data. If parity is set to , an additional stop bit is used to force the frame size to 10 bits.

ABBREVIATED PRINTING

«

ª

This parameter determines the formatting of data transmitted from the meter in response to a Transmit Value (T) command or a Block Print Request (P)

command. Select

for a Full print transmission, which consists of the meter

address, mnemonics, and parameter data. Select for abbreviated print transmissions, consisting of the parameter data only. This setting affects all the parameters selected in the PRINT OPTIONS. (Note: If the meter address is 00, the address will not be sent during a Full transmission.)

PTC901: REAL-TIME CLOCK PRINT FORMATTING

 

«

ª

 

This parameter determines the formatting of the Real-Time Clock (RTC)

values transmitted from the meter in response to a Transmit Value (T) command

or a Block Print Request (P) command. This parameter appears only when a

Real-Time Clock plug-in option card is installed.

When

is selected, RTC values are formatted as per the RTC Time and

Date Display Formats programmed in Module 8. The Day of Week value is sent

as a character string.

When

is selected, the meter sends the RTC values as numeric data only.

RTC Time/Date units are separated by a “.”. The Day is sent as a single number

as shown below.

TIME - Hours (24-Hr. format), Minutes, Seconds (HHMMSS)

DATE - Month, Day, Year (mmddyy)

DAY

- 1 = Sunday thru 7 = Saturday

PRINT OPTIONS

« ª

This parameter selects the meter values transmitted in response to a Print Request. A Print Request is sometimes referred to as a block print because more than one parameter can be sent to a printer or computer as a block.

Selecting

displays a sublist for choosing the meter parameters to appear

in the block

print. All parameters

entered as

in

the sublist will be

transmitted during a block print. Parameters entered as

 

will not be sent.

DISPLAY

PARAMETER

FACTORY

MNEMONIC

 

Timer

 

 

TMR

ª

METER ADDRESS

« to

t-dsp

 

yES

 

C-dSP

Cycle Counter

NO

CNT

 

 

 

 

rtC-d

RTC Date*

NO

DAT

rtC-t

RTC Time*

NO

TIM

SPNt

Setpoint Values*

NO

SP1 SP2 SP3 SP4

Enter the serial meter (node) address. With a single meter, an address is not needed and a value of zero can be used. With multiple meters (RS485 applications), a unique 2 digit address number must be assigned to each meter.

Addresses 98 and 99 are reserved to configure a unit as a serial real-time clock master. See Serial Real-time Clock Master Adressing.

SpNtOF

Setpoint Off/Time-Out Values*

NO

SO1 SO2 SO3 SO4

StrStp

Timer/Cnt Start & Stop Values

NO

TST TSP CST CSP

*These values are plug-in card dependent.

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Omega Vehicle Security PTC900 manual Module 7 Serial Communications Parameters, SPNt, StrStp
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