ESD VME-DAC1612 User manual

VME-DAC1612
16 Analog Outputs
Manual
to Product V.1706.08, V.1706.16
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 1 of 50
esd electronic system design gmbh
Vahrenwalder Str. 207 • 30165 Hannover • ermany
http://www.esd.eu
Phone: [phone] • Fax: [phone]

N O T E
Th information in this docum nt has b n car fully ch ck d and is b li v d to b ntir ly r liabl .
esd mak s no warranty of any kind with r gard to th mat rial in this docum nt, and assum s no
r sponsibility for any rrors that may app ar in this docum nt. In particular d scriptions and
t chnical data sp cifi d in this docum nt may not b constitut d to b guarant d product f atur s
in any l gal s ns .
esd r s rv s th right to mak chang s without notic to this, or any of its products, to improv
r liability, p rformanc or d sign.
All rights to this docum ntation ar r s rv d by esd. Distribution to third parti s, and r production
of this docum nt in any form, whol or in part, ar subj ct to esd's writt n approval.
© 2016 sd l ctronic syst m d sign gmbh, Hannov r
sd l ctronic syst m d sign gmbh
Vahr nwald r Str. 207
30165 Hannov r
G rmany
Phon : [phone]
Fax: [phone]
E-Mail: info@ sd. u
Int rn t: www. sd. u
This manual contains important information and instructions on saf and ffici nt
handling of th VME-DAC1612. Car fully r ad this manual b for comm ncing any
work and follow th instructions.
Th manual is a product compon nt, pl as r tain it for futur us .
Trad mark Notic s
All trad marks, product nam s, company nam s or company logos us d in this manual ar r s rv d by th ir
r sp ctiv own rs.
Pag 2 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Document file: I:\T xt \Doku\MANUALS\VME\DAC1612\Englisch\VME-DAC1612_Manual_ n_12.odt
Date of p int: 2016-05-23
Document type
numbe : DOC0800
Ha dwa e ve sion: VME-DAC1612 R v. 1.2
Document Histo y
Th chang s in th docum nt list d b low aff ct chang s in th hardwar as w ll as chang s in th
d scription of th facts, only.
Rev. Chapte Changes ve sus p evious ve sion Date
1.1 4.1.2.1 D fault valu of bas addr ss corr ct d. 2002-06-26
4.1.4 Jump r unipolar/bipolar: M aning of s tting corr ct d.
1.2
-“Classification of Warning M ssag s and Saf ty Instructions” ins rt d,
Saf ty Instructions ins rt d
2016-05-23
1.1 Block circuit diagram chang d, d scription of options ins rt d
1.2. Chapt r “Front Pan l ” mov d
2.2 N w chapt r: “VMEbus Int rfac ”
4.1.4
D8 - tabl corr ct d,
D9 - d scription ins rt d
D10 - tabl corr ct d
D11 - tabl ins rt d,
D12-D15 - tabl corr ct d
5.2.1 Tabl corr ct d, not s ins rt d.
6. N w chapt r “Hardwar Installation”
8. Chapt r mov d
8.2 Not on supply voltag s chang d
9. Chapt r mov d
10. Chapt r mov d and r vis d
T chnical d tails ar subj ct to chang without furth r notic .
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 3 of 50

Classification of Wa ning Messages and Safety Inst uctions
This manual contains notic abl d scriptions, warning m ssag s and saf ty instructions, which
you must follow to avoid p rsonal injuri s or d ath and prop rty damag .
This is th saf ty al rt symbol.
It is us d to al rt you to pot ntial p rsonal injury hazards. Ob y all saf ty m ssag s
and instructions that follow this symbol to avoid possibl injury or d ath.
DANGER, WARNING, CAUTION
D p nding on th hazard l v l th signal words DANGER, WARNING or CAUTION ar us d to
highlight saf ty instructions and warning m ssag s. Th s m ssag s may also includ a warning
r lating to prop rty damag .
DANGER
Dang r stat m nts indicat a hazardous situation which, if not avoid d, will r sult in
d ath or s rious injury.
WARNING
Warning stat m nts indicat a hazardous situation that, if not avoid d, could r sult in
d ath or s rious injury.
CAUTION
Caution stat m nts indicat a hazardous situation that, if not avoid d, could r sult in
minor or mod rat injury.
NOTICE
Notic stat m nts ar us d to notify p opl on hazards that could r sult in things oth r than
p rsonal injury, lik prop rty damag .
NOTICE
This NOTICE stat m nt indicat s that th d vic contains compon nts s nsitiv to
l ctrostatic discharg .
NOTICE
This NOTICE stat m nt contains th g n ral mandatory sign and giv s information that
must b h d d and compli d with for a saf us .
INFORMATION
INFORMATION
Not s to point out som thing important or us ful.
Pag 4 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Safety Inst uctions
● Wh n working with th VME-DAC1612 follow th instructions b low and r ad th manual car fully to
prot ct yours lf from injury and th VME-DAC1612 from damag .
● Th d vic is a built-in compon nt. It is ss ntial to nsur that th d vic is mount d in a way that
cannot l ad to ndang ring or injury of p rsons or damag to obj cts.
● Do not us damag d or d f ctiv cabl s to conn ct th VME-DAC1612.
● In cas of damag s to th d vic , which might aff ct saf ty, appropriat and imm diat m asur s
must b tak n, that xclud an ndang rm nt of p rsons and dom stic animals and prop rty.
● Curr nt circuits which ar conn ct d to th d vic hav to b suffici ntly prot ct d against
hazardous voltag (SELV according to EN 60950-1).
● Th VME-DAC1612 may only b driv n by pow r supply curr nt circuits, that ar contact prot ct d.
A pow r supply, that provid s a saf ty xtra-low voltag (SELV) according to EN 60950-1, compli s
with this conditions.
● Th d vic has to b s cur ly install d in th control cabin t b for commissioning.
● Prot ct th VME-DAC1612 from dust, moistur and st am.
● Prot ct th VME-DAC1612 from shocks and vibrations.
● Th VME-DAC1612 may b com warm during normal us . Always allow ad quat v ntilation
around th VME-DAC1612 and us car wh n handling.
● Do not op rat th VME-DAC1612 adjac nt to h at sourc s and do not xpos it to unn c ssary
th rmal radiation. Ensur an ambi nt t mp ratur as sp cifi d in th t chnical data.
DANGER
Hazardous Voltag - Risk of elect ic shock du to unint ntional contact with
uninsulat d liv parts with high voltag s insid of th syst m into which th VME-
DAC1612 is to b int grat d.
→ Disconn ct all hazardous voltag s (mains voltag ) b for op ning th syst m.
→ Ensur th abs nc of voltag b for starting any l ctrical work
NOTICE
Elect ostatic discha ges may cause damage to elect onic components.
To avoid this, p rform th st ps d scrib d on pag 34 before you touch th VME-
DAC1612, in ord r to discharg th static l ctricity from your body.
Qualified Pe sonal
This docum ntation is dir ct d xclusiv ly towards p rsonal qualifi d in control and automation
ngin ring. Th installation and commissioning of th product may only b carri d out by qualifi d
p rsonal, which is authoriz d to put d vic s, syst ms and l ctric circuits into op ration according to
th applicabl national standards of saf ty ngin ring.
Confo mity
Th VME-DAC1612 is a sub-ass mbly int nd d for incorporation into an apparatus by a manufactur r
and NOT by th nd us r. Th manufactur r of th final syst m must d cid , wh th r additional EMC
or EMI prot ction r quir m nts ar n c ssary.
Intended Use
Th int nd d us of th VME-DAC1612 is th op ration as VMEbus board for th g n ration of up to
16 analog signals for proc ss control purpos s.
Th guarant giv n by sd do s not cov r damag s which r sult from improp r us , usag not in
accordanc with r gulations or disr gard of saf ty instructions and warnings.
● Th VME-DAC1612 is int nd d for installation in VMEbus syst ms only.
● Th op ration of th VME-DAC1612 in hazardous ar as, or ar as xpos d to pot ntially xplosiv
mat rials is not p rmitt d.
● Th op ration of th VME-DAC1612 for m dical purpos s is prohibit d.
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 5 of 50

Se vice Note
Th VME-DAC1612 do s not contain any parts that r quir maint nanc by th us r. Th VME-
DAC1612 do s not r quir any manual configuration of th hardwar but th configuration of th
jump rs and th coding switch s as d scrib d in this manual. Unauthoriz d int rv ntion in th d vic
voids warranty claims.
Disposal
D vic s which hav b com d f ctiv in th long run hav to b dispos d in an appropriat way or
hav to b r turn d to th manufactur r for prop r disposal. Pl as , mak a contribution to
nvironm ntal prot ction.
Typog aphical Conventions
Throughout this manual th following typographical conv ntions ar us d to distinguish t chnical t rms.
Convention Example
Fil and path nam s /dev/null or <stdio.h>
Function nam s open()
Programming constants NULL
Programming data typ s uint32_t
Variabl nam s Count
Numbe Rep esentation
All numb rs in this docum nt ar bas 10 unl ss d signat d oth rwis . H xad cimal numb rs hav a
pr fix of 0x. For xampl , 42 is r pr s nt d as 0x2A in h xad cimal.
Pag 6 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Table of contents
Saf ty Instructions.....................................................................................................................................5
1. Ov rvi w.................................................................................................................................................8
1.1 Modul D scription..........................................................................................................................8
1.2 Front Pan l .....................................................................................................................................9
2. T chnical Data......................................................................................................................................10
2.1 G n ral T chnical Data.................................................................................................................10
2.2 VMEbus Int rfac ..........................................................................................................................10
2.3 T chnical Data of Analog Units......................................................................................................11
3. Addr ss Assignm nt.............................................................................................................................12
4. Jump rs and Coding Switch s.............................................................................................................13
4.1 PCB-Vi w......................................................................................................................................13
4.1.1 D fault S tting of Jump rs...................................................................................................14
4.1.2 S tting Basis Addr ss and Addr ss Modifi r D coding.......................................................15
4.1.2.1 Basis Addr ss (Coding Switch).....................................................................................15
4.1.2.2 Addr ss Modifi r (J120).................................................................................................16
4.1.3 Configuration of Analog Units...............................................................................................18
4.1.4 Mod R gist r (J130)...........................................................................................................19
4.1.5 N gation of Data Bit D11 (J300) .........................................................................................22
4.1.6 S l cting th Output Voltag Rang (J400-J731) ..............................................................23
5. Analog Outputs.....................................................................................................................................25
5.1 Output Circuit.................................................................................................................................25
5.2 Op rating Mod s of th D/A-Conv rt rs.......................................................................................26
5.2.1 Data Transf r........................................................................................................................26
5.2.2 Unipolar Op ration 0...10 V..................................................................................................28
5.2.3 Bipolar Op ration ±5 V.........................................................................................................29
5.2.4 Bipolar Op ration ±10 V.......................................................................................................30
5.3 Adjusting th D/A-Conv rt rs........................................................................................................31
5.3.1 Offs t S tting........................................................................................................................32
5.3.2 Gain......................................................................................................................................33
6. Hardwar Installation............................................................................................................................34
7. Softwar ...............................................................................................................................................35
7.1 Initialisation....................................................................................................................................35
7.2 PEARL-Exampl Program to G n rat Lissajous-Figur s on an Oscilloscop ............................36
8. Conn ctor Assignm nt.........................................................................................................................37
8.1 VMEbus Conn ctor P1..................................................................................................................37
8.2 I/O-Conn ctor P2 and Transition Modul ......................................................................................38
8.3 Post Conn ctors P800 and P801..................................................................................................40
9. DAC812-Adapt r (DAC812-20mA) .....................................................................................41
9.1 Ov rvi w........................................................................................................................................41
9.2 PCB Vi w with Jump rs................................................................................................................41
9.3 D fault S ttings of Jump rs..........................................................................................................42
9.4 D scription of Jump rs..................................................................................................................42
9.5 Conv rsion of Voltag s to Curr nts...............................................................................................44
9.6 Adjusting th Chann ls..................................................................................................................44
9.7 Assignm nt of Conn ctors of th DAC812-Adapt r......................................................................45
9.7.1 Transition Conn ctor P2.......................................................................................................46
9.7.2 Analog Outputs at P3............................................................................................................48
9.7.3 Supplying th Analog Units via Scr w T rminals (P4, P5) ..................................................49
9.7.4 Analog Outputs via Scr w T rminals (P11-P18) ..................................................................49
10. Ord r Information...............................................................................................................................50
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 7 of 50

Ove view
1. Ove view
1.1 Module Desc iption
Figu e 1: Block circuit diagram of th VME-DAC1612 modul
Th VME-DAC1612 is an int rfac board d sign d for th g n ration of 8 analog signals (VME-
DAC1612-8) or 16 analog signals(VME-DAC1612-16) for proc ss control purpos s.
Th output voltag s can b s l ct d as ±5 V, ±10 V or 0 ...+10 V, with a r solution of 12 bits.
A D/A-conv rt r of DAC 813 typ is us d. Th control and data signals b tw n VMEbus and analog
proc ss ar l ctrically insulat d by m ans of fast digital coupl rs.
Th pow r supply of th analog sid (±15 V, +5 V) ar g n rat d by DC/DC-conv rt rs from th +5
VMEbus pow r supply.
Th VME-DAC1612 is compatibl to VMEbus Standard R v. C. With a h ight of 4 HP it us s on slot
on th VMEbus.
In th customiz d v rsion VME-DAC1612-XVME530 th board com s with 5 outputs, 12 bits,
adjust d for 0...+10 V. Th front-I/O, I/O data acc ss and pow r supply ar compatibl with
XYCOM XVME530.
Pag 8 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612
P1 VMEbus
Isolator IL715
VMEbus P2
+5V
±12V
DC/DC-Converter
8 or 16
D/A-Converter Channels
P2 Outputs 1..16
Connector at
Front Panel
VME ddress
and M
Decoder Logic
Mode Register
VME
Data Bus
Driver
Digital / nalog
Converter
D C 813
ddress, Data and Control Bus
Electrical Isolation
Digital / nalog
Converter
D C 813
Digital / nalog
Converter
D C 813
P800 Outputs 1...8P801 Outputs 9...16

Ove view
1.2 F ont Panel
Figu e 2: PCB top vi w
NOTICE
R ad chapt r “Hardwar Installation” on pag 34, b for you start with th installation of
th hardwar !
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 9 of 50
BUSY
ADR
A
15
:
12
11
:
8
DAC1612
D
A
C
O
U
T
1
8
D
A
C
O
U
T
16
9
LED 'Busy' (yellow):
- On, if VMEbus has access to
the board
Coding switch SW122:
- dress bits 12... 15
Coding switch SW123:
- dress bits 8... 11
Post connector P801:
- nalog outputs 9...16
Post connector P800:
- nalog outputs 1...8

Technical Data
2. Technical Data
2.1 Gene al Technical Data
T mp ratur rang max. p rmissibl ambi nt t mp ratur :
0...70 °C
Humidity max. 90%, non-cond nsing
Conn ctors P1 - DIN 41612-C96 (VMEbus)
P2 - DIN 41612-C64 (analog outputs 1-16)
P800 - 34-pin post conn ctor (analog outputs 1-8)
P801 - 34-pin post conn ctor (analog outputs 9-16)
X140 - 8-pin sock t strip (ISP-programming for t sting)
Board dim nsions 160 mm x 233 mm
W ight ca. 320 g
Pow r supply VMEbus P1: 5V ± 5% / 1.6 A
(typical, at T = 20 °C, 16 chann ls)
Table 1: G n ral modul data
2.2 VMEbus Inte face
VMEbus int rfac IEEE 1014 / C.1
Data transf r mod A16/D16, A24/D16
Int rrupts non
VME acc ss tim < 150 ns (up to DTACK)
VMEbus installation 6 U high / 4 HP wid
front pan l with l v r holds
Table 2: G n ral modul data
Pag 10 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Technical Data
2.3 Technical Data of Analog Units
Numb r of D/A-chann ls 8 or 16
R solution 12 bits
D/A-conv rt r DAC813
Output voltag configurabl via jump rs: 0-10 V, ±5 V, ±10 V
Output capacity RL ≥ 2 kΩ
R solution ± 1 LSB in adjust d status, i. . *)
at 0-10 V: ≤ ± 2.5 mV
at ±5 V: ≤ ± 2.5 mV
at ±10 V: ≤ ± 5.0 mV
INFORMATION *)
Th board is d fault s t and adjust d to bipolar op ration
(±10V).
If th board is s t to unipolar op ration (0...10 V) via
jump rs without b ing coordinat d via th gain
pot ntiom t r aft rwards, you hav to consid r an
additional d viation of about ½ LSB (r f rr d to maximum
valu ).
S ttling tim of D/A-
conv rt r max. 6 μs / chann l (at voltag swing 20 V, final valu achi v d to 0.01%)
Table 3: T chnical data of analog units
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 11 of 50

Add ess Assignment
3. Add ess Assignment
Th basis addr ss of th board is configur d via th coding switch s SW120...SW124. Th basis
addr ss can b s t in st ps of 32 byt s in th 16 Mbyt addr ss rang .
In addition to 'STANDARD' acc ss s (A24) th r is th possibility to us th VME-addr ssing
'SHORT I/O' (jump r J120). In this addr ssing th addr ss lin s A16 to A23 ar ignor d and th
basis addr ss of th VME-DAC1612 board is s t in th 'SHORT I/O' addr ss rang (64 KByt ) of
th VME-syst m.
Th basis addr ss of th VME-DAC1612 is d fault s t to 0xXXE20000.
Each of th 16 D/A-conv rt rs of th VME-DAC1612 has got its own acc ss addr ss, which has to
b addr ss d word-by-word. In addition a mod r gist r can b r ad in which th s tting of th
op rating mod and th numb r of quipp d chann ls of th VME-DAC1612 is valuat d.
INFORMATION
If jump r J130/pin 1-2 is not s t, th D/A-conv rt rs ar s l ct d by m ans of th data
bits D15...D12 (s pag 27).
Unit Offs t
addr ss Acc ss mod
D/A-conv rt r:
DAC16
DAC15
DAC14
DAC13
DAC12
DAC11
DAC10
DAC9
+ 0x1E
+ 0x1C
+ 0x1A
+ 0x18
+ 0x16
+ 0x14
+ 0x12
+ 0x10
word-by-word,
only writing acc ss
D/A-conv rt r:
DAC8
DAC7
DAC6
DAC5
DAC4
DAC3
DAC2
DAC1
+ 0xE
+ 0xC
+ 0xA
+ 0x8
+ 0x6
+ 0x4
+ 0x2
+ 0x0
word-by-word,
only writing acc ss
Mod r gist r + 0x0 word-by-word,
only r ading acc ss
Table 4: Addr ss assignm nt of VME-DAC1612
Pag 12 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Jumpe s and Coding Switches
4. Jumpe s and Coding Switches
4.1 PCB-View
Figu e 3: Position of coding switch s and jump rs
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 13 of 50

Jumpe s and Coding Switches
4.1.1 Default Setting of Jumpe s
Th according d fault s tting at board d liv ry is shown in th tabl b low.
For th position of jump rs pl as r f r to figur 3. Th jump rs will b shown b low as s n by
us rs with th board in front of th m and th VMEbus conn ctors on th right.
D fault s tting of th jump rs:
Jump r Function D fault s tting at board d liv ry
SW120...
SW123 basis addr ss of board VME-DAC1612: 0xE20000
J120 addr ss modifi r d coding short/standard sup rvisory and non-
privil g d acc ss s p rmitt d
J130 mod r gist r d p nding on mod l and th output voltag
rang s l ct d
J300 output l v l aft r RESET (n gation of data bit D11 for th
D/A-conv rt rs)
D11 is inv rt d, i. . a bipolar op ration has
b n s l ct d
J400, J410,
J420, J430,
J500, J510,
J520, J530,
J600, J610,
J620, J630,
J700, J710,
J720, J730
voltag swing of th D/A-
conv rt r assign d U = 20 V - voltag rang = ±10 V▸
J401, J411,
J421, J431,
J501, J511,
J521, J531,
J601, J611,
J621, J631,
J701, J711,
J721, J731
bipolar/unipolar conv rsion of th
D/A-conv rt r assign d bipolar : ±5V, ±10V
Table 5: D fault s tting of jump rs
Pag 14 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Jumpe s and Coding Switches
4.1.2 Setting Basis Add ess and Add ess Modifie Decoding
4.1.2.1 Basis Add ess (Coding Switch)
Addr ss bits S tting via coding
switch s D fault s tting Position
A23...A20 SW120 0xE on board n xt to VMEbus conn ctor P1
A19...A16 SW121 2
A15...A12 SW122 0 in front pan l (abov )
A11...A8 SW123 0 in front pan l (b low)
Table 6: S tting of basis addr ss
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 15 of 50

Jumpe s and Coding Switches
4.1.2.2 Add ess Modifie (J120)
Th addr ss modifi rs AM0 to AM5 ar compl t ly valuat d on board. Th signals AM3 and AM5
ar always d cod d as '1'. Th oth r signals can b configur d via th jump r fi ld J120. A s t
jump r s ts th according bit to '0'.
J120
Exampl shown: standard s tting of addr ss modifi rs:
standard sup rvisory data acc ss and
standard non-privil g d data acc ss and
short sup rvisory I/O acc ss and
short non-privil g d I/O acc ss p rmitt d
Th AM-configurations availabl to th VME-DAC1612 ar list d in th tabl b low. In addition to
th AM-combinations list d, th bit AM2 can b ignor d at d coding by s tting jump r 'AM2 don't
car '. Sup rvisor as w ll as non-privil g d acc ss s ar p rmitt d (s also xampl shown).
CODE AM5 AM4 AM3 AM2 AM1 AM0 Function
0x3E 1 1 1 1 1 0 standard sup rvisory
program acc ss
0x3D 1 1 1 1 0 1 standard sup rvisory
data acc ss
0x3A 1 1 1 0 1 0 standard non-privil g d
program acc ss
0x39 1 1 1 0 0 1 standard non-privil g d
data acc ss
0x2D 1 0 1 1 0 1 short sup rvisory
I/O acc ss
0x29 1 0 1 0 0 1 short non-privil g d
I/O acc ss
Table 7: S l ctabl AM-combinations
Pag 16 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612
2
AM0
5
1
98
AM1
AM2
AM4
AM2 don't car

Jumpe s and Coding Switches
Jump r fi ld
J120
P rmissibl AM-cod s Addr ssing
AM5 AM4 AM3 AM2 AM1 AM0 HEX
1
1
1
1
1
1
0
1
0
0
1
1
0x39
0x3D
standard non-privil g d
data acc ss
or
standard sup rvisory
data acc ss
1 1 1 1 0 1 0x3D standard sup rvisory
data acc ss
1 1 1 0 0 1 0x39 standard non-privil g d
data acc ss
1
1
0
0
1
1
0
1
0
0
1
1
0x29
0x2D
short non-privil g d
acc ss
or
short sup rvisory
acc ss
1 0 1 1 0 1 0x2D short sup rvisory
acc ss
1 0 1 0 0 1 0x29 short non-privil g d
acc ss
Table 8: R comm nd d us ful AM-combinations
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 17 of 50
Jump r op n
Jump r clos d
2
5
1
98
2
5
1
98
2
5
1
98
2
5
1
98
2
5
1
98
2
5
1
98

Jumpe s and Coding Switches
4.1.3 Configu ation of Analog Units
34 jump r fi lds hav b n d sign d for th configuration of th board (numb r of chann ls,
unipolar or bipolar op ration).
Via jump r fi ld J130 th numb r of quipp d chann ls and a global flag for unipolar or bipolar
op ration is s t in th mod r gist r.
Via jump r fi ld J300 th data bit D11 can b inv rt d for all D/A-conv rt rs tog th r. This can b
us d, for xampl , to r s t th D/A-conv rt rs to 0 V in bipolar op ration aft r a RESET.
Jump rs J400 to J731 switch th r sp ctiv D/A-conv rt r outputs to unipolar or bipolar op ration
and th d sir d voltag swing.
Pag 18 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612

Jumpe s and Coding Switches
4.1.4 Mode Registe (J130)
Th mod r gist r is a 'r ad-only' r gist r to configur th board via softwar . It is r ad as WORD
und r th local addr ss '0x00'. Th LSB (D0-D7) is always r ad as 0x01. It is us d to id ntify th
board as VME-DAC1612 in th VMEbus syst m.
Th MSB contains information about th numb r of D/A-conv rt r chann ls quipp d and th
polarity of th output voltag . D p nding on wh th r th output voltag is unipolar or bipolar, th
D/A-data has to b sp cifi d in th format 'Unipolar Straight Binary' or 'Binary Two's Compl m nt'.
R gist r bit Assignm nt
D15
Numb r of D/A-conv rt r chann ls (s t via th quipm nt of r sistors)
D14
D13
D12
D11 Jump r J130, pin 7-8, availabl for us r
D10 Jump r J130, pin 5-6, switching b tw n unipolar/bipolar
D9 Jump r J130, pin 3-4, switching to Big_Endian_Mod
D8 Jump r J130, pin 1-2, DAC-addr ss s D12-D15/A1-A4
D7 0
Th s bits id ntify th board in th VMEbus syst m and cannot b
chang d.
D6 0
D5 0
D4 0
D3 0
D2 0
D1 0
D0 1
Table 9: Jump r fi ld J130 in mod r gist r
A s t jump r s ts th according data bit to '0'.
VME-DAC1612 Manual • Doc. No.: V.1706.21 / R v. 1.2 Pag 19 of 50

Jumpe s and Coding Switches
D8: DAC-addr ss s
D12-D15/A1-A4... Th D/A-conv rt rs of th VME-DAC1612 ar usually s l ct d via th four l ast significant addr ss bits (A1...A4).
If th jump r J130/pin 1-2 has not b n s t, th D/A-conv rt rs ar
not s l ct d via th addr ss s, but th most significant data bits
(D11...D15). Th s bits ar transmitt d along with th 12-bit analog
valu . In this cas th addr ss bits A1 ...A4 can b fr ly s t.
On th standard v rsion of th board this jump r is d fault-s t.
Jump r J130,
pin 1-2 Bit D8 S l ction of th D/A-conv rt r chann ls
s t 0 via th addr ss bits A1...A4
Default setting at delive y
op n 1 via data bits D12...D15
(addr ss bits A1...A4 ar not valuat d)
Table 10: Mod for s l ction of D/A conv rt r chann ls
D9: Big Endian Mod ... D9 sp cifi s wh th r Big Endian Mod is s t inst ad of th standard
format (LSB first).
Jump r J130,
pin 5-6 Bit D9 Data format
s t 0 Big Endian (MSB first)
op n 1 Littl Endian (standard format, LSB first)
Table 11: S l ction of Big Endian Mod
D10: unipolar/bipolar... D10 sp cifi s wh th r th D/A-conv rt rs on board hav b n
configur d for unipolar or bipolar op ration. Th format of th
transmitt d D/A-data d p nds on th polarity s l ct d.
Jump r J130,
pin 5-6 Bit D10 Polarity Data format
s t 0 bipolar BTC (Binary Two's Compl m nt)
Default setting at delive y
op n 1 unipolar USB (Unipolar Straight Binary)
Table 12: Coding for unipolar/bipolar op ration
In principl it is possibl to s l ct unipolar op ration for som
chann ls and bipolar op ration for oth rs. How v r, this is not
r comm ndabl , b caus it do s not only caus irr gulariti s for this
jump r, but also for jump r fi ld J300. Esp cially th r s tting of
chann ls to 0 V aft r a RESET is not possibl simultan ously for
unipolar and bipolar op ration.
Pag 20 of 50 Manual • Doc. No.: V.1706.21 / R v. 1.2 VME-DAC1612